diff --git a/.github/chain-types.md b/.github/chain-types.md
new file mode 100644
index 0000000000..0ddb642102
--- /dev/null
+++ b/.github/chain-types.md
@@ -0,0 +1,10 @@
+---
+title: Outdated chain types
+labels: ['ci', '@apps-config']
+---
+
+cc @polkadot-js/notifications
+
+Some configured chains have outdated types and is determined to problematic as an available chain.
+
+Check the nightly cron output (or via `yarn ci:chainTypes` locally) and disable the chains until the issue is resolved. The output as found from the test includes:
diff --git a/.github/workflows/chain-types.yml b/.github/workflows/chain-types.yml
new file mode 100644
index 0000000000..b0802f701c
--- /dev/null
+++ b/.github/workflows/chain-types.yml
@@ -0,0 +1,25 @@
+name: Chain type check
+on:
+  schedule:
+    - cron:  '30 0 * * *'
+
+jobs:
+  ss58:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: check
+      env:
+        CI_LOG: 123
+      run: |
+        yarn install --immutable | grep -v 'YN0013'
+        yarn ci:chainTypes
+
+    - name: issue
+      if: ${{ failure() }}
+      uses: JasonEtco/create-an-issue@v2
+      env:
+        GITHUB_TOKEN: ${{ secrets.GH_PAT_BOT }}
+      with:
+        filename: .github/chain-types.md
+        update_existing: true
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
index aedb705e58..2bfe505097 100644
--- a/.github/workflows/stale.yml
+++ b/.github/workflows/stale.yml
@@ -12,6 +12,6 @@ jobs:
           repo-token: ${{ secrets.GH_PAT_BOT }}
           stale-issue-message: 'This issue has been open for 21 days with no activity and is not labelled as an enhancement. It will be closed in 7 days.'
           stale-issue-label: 'stale'
-          exempt-issue-labels: '-size-l,-size-m,-size-s,-size-xl,-size-xs,[bug]'
+          exempt-issue-labels: '-size-l,-size-m,-size-s,-size-xl,-size-xs,[bug],ci'
           days-before-stale: 21
           days-before-close: 7
diff --git a/jest.config.cjs b/jest.config.cjs
index 3cc032fcf6..08b54edc40 100644
--- a/jest.config.cjs
+++ b/jest.config.cjs
@@ -24,6 +24,6 @@ module.exports = {
   },
   setupFilesAfterEnv: ['<rootDir>/jest/jest-setup.ts'],
   testEnvironment: 'jsdom',
-  testTimeout: 25000,
+  testTimeout: 60000,
   transformIgnorePatterns: ['/node_modules/(?!@polkadot|@babel/runtime/helpers/esm/)']
 };
diff --git a/package.json b/package.json
index 93a741aa18..04cef06dd4 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,7 @@
     "packElectron:linux": "yarn build:release:electron && electron-builder build --linux",
     "packElectron": "yarn build:release:electron && yarn clean:electronRelease && electron-builder build -mwl",
     "docs": "echo \"skipping docs\"",
+    "ci:chainTypes": "polkadot-dev-run-test --silent packages/apps-config/src/ciChainTypes",
     "clean": "polkadot-dev-clean-build",
     "clean:electronBuild": "cd packages/apps-electron && polkadot-dev-clean-build",
     "clean:electronRelease": "cd packages/apps-electron && rm -rf release",
diff --git a/packages/apps-config/src/ciChainTypes.spec.ts b/packages/apps-config/src/ciChainTypes.spec.ts
new file mode 100644
index 0000000000..bfe546cb99
--- /dev/null
+++ b/packages/apps-config/src/ciChainTypes.spec.ts
@@ -0,0 +1,73 @@
+// Copyright 2017-2021 @polkadot/apps-config authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import { ApiPromise, WsProvider } from '@polkadot/api';
+import { assert, isError, isString } from '@polkadot/util';
+import { fetch } from '@polkadot/x-fetch';
+
+import { typesBundle, typesChain } from './api';
+import { createWsEndpoints } from './endpoints';
+
+interface Endpoint {
+  name: string;
+  ws: string;
+}
+
+interface DnsResponse {
+  Answer?: { name: string }[];
+  Question: { name: string }[];
+}
+
+const endpoints = createWsEndpoints((k: string, v?: string) => v || k, true)
+  .filter(({ isDisabled, value }) => !isDisabled && value && isString(value) && !value.startsWith('ws://'))
+  .map(({ text, value }): Partial<Endpoint> => ({ name: text as string, ws: value as string }))
+  .filter((v): v is Endpoint => !!v.ws);
+
+describe('--SLOW--: check configured chain connections', (): void => {
+  endpoints.forEach(({ name, ws }) =>
+    it(`${name} @ ${ws}`, async (): Promise<void> => {
+      const [,, hostWithPort] = ws.split('/');
+      const [host] = hostWithPort.split(':');
+
+      const response = await fetch(`https://dns.google/resolve?name=${host}`);
+      const json = await response.json() as DnsResponse;
+
+      assert(json.Answer, `No DNS entry for ${host}`);
+
+      let provider: WsProvider | null = null;
+      let api: ApiPromise | null = null;
+
+      try {
+        provider = new WsProvider(ws, false);
+        api = new ApiPromise({
+          provider,
+          throwOnConnect: true,
+          typesBundle,
+          typesChain
+        });
+
+        setTimeout((): void => {
+          provider && provider.connect().catch(() => undefined);
+        }, 1000);
+
+        await api.isReadyOrError;
+      } catch (error) {
+        if (isError(error) && error.message.includes('Cannot construct unknown type')) {
+          throw error;
+        }
+      } finally {
+        if (provider) {
+          try {
+            if (api) {
+              await api.disconnect();
+            } else {
+              await provider.disconnect();
+            }
+          } catch {
+            // ignore
+          }
+        }
+      }
+    })
+  );
+});
diff --git a/packages/apps-config/src/endpoints/index.ts b/packages/apps-config/src/endpoints/index.ts
index 72293f77cf..4e960b5ed3 100644
--- a/packages/apps-config/src/endpoints/index.ts
+++ b/packages/apps-config/src/endpoints/index.ts
@@ -12,7 +12,7 @@ import { createTestingRelays } from './testingRelays';
 
 export { CUSTOM_ENDPOINT_KEY } from './development';
 
-export function createWsEndpoints (t: TFunction): LinkOption[] {
+export function createWsEndpoints (t: TFunction, firstOnly?: boolean): LinkOption[] {
   return [
     ...createCustom(t),
     {
@@ -23,7 +23,7 @@ export function createWsEndpoints (t: TFunction): LinkOption[] {
       textBy: '',
       value: ''
     },
-    ...createProductionRelays(t),
+    ...createProductionRelays(t, firstOnly),
     {
       isDisabled: false,
       isHeader: true,
@@ -31,7 +31,7 @@ export function createWsEndpoints (t: TFunction): LinkOption[] {
       textBy: '',
       value: ''
     },
-    ...createTestingRelays(t),
+    ...createTestingRelays(t, firstOnly),
     {
       isDisabled: false,
       isHeader: true,
@@ -40,7 +40,7 @@ export function createWsEndpoints (t: TFunction): LinkOption[] {
       textBy: '',
       value: ''
     },
-    ...createProduction(t),
+    ...createProduction(t, firstOnly),
     {
       isDisabled: false,
       isHeader: true,
@@ -48,7 +48,7 @@ export function createWsEndpoints (t: TFunction): LinkOption[] {
       textBy: '',
       value: ''
     },
-    ...createTesting(t),
+    ...createTesting(t, firstOnly),
     {
       isDevelopment: true,
       isDisabled: false,
diff --git a/packages/apps-config/src/endpoints/production.ts b/packages/apps-config/src/endpoints/production.ts
index 0d65eae89a..c59a2f7c4d 100644
--- a/packages/apps-config/src/endpoints/production.ts
+++ b/packages/apps-config/src/endpoints/production.ts
@@ -15,7 +15,7 @@ import { expandEndpoints } from './util';
 //   value: The actual hosted secure websocket endpoint
 
 // alphabetical based on chain name
-export function createProduction (t: TFunction): LinkOption[] {
+export function createProduction (t: TFunction, firstOnly?: boolean): LinkOption[] {
   return expandEndpoints(t, [
     {
       dnslink: 'centrifuge',
@@ -166,5 +166,5 @@ export function createProduction (t: TFunction): LinkOption[] {
         DataHighway: 'wss://westlake.datahighway.com'
       }
     }
-  ]);
+  ], firstOnly);
 }
diff --git a/packages/apps-config/src/endpoints/productionRelays.ts b/packages/apps-config/src/endpoints/productionRelays.ts
index 4e773f7cfa..6076fa3e5d 100644
--- a/packages/apps-config/src/endpoints/productionRelays.ts
+++ b/packages/apps-config/src/endpoints/productionRelays.ts
@@ -8,9 +8,9 @@ import { createKusama } from './productionRelayKusama';
 import { createPolkadot } from './productionRelayPolkadot';
 import { expandEndpoints } from './util';
 
-export function createProductionRelays (t: TFunction): LinkOption[] {
+export function createProductionRelays (t: TFunction, firstOnly?: boolean): LinkOption[] {
   return expandEndpoints(t, [
     createPolkadot(t),
     createKusama(t)
-  ]);
+  ], firstOnly);
 }
diff --git a/packages/apps-config/src/endpoints/testing.ts b/packages/apps-config/src/endpoints/testing.ts
index 8d541f68db..5ccb28999f 100644
--- a/packages/apps-config/src/endpoints/testing.ts
+++ b/packages/apps-config/src/endpoints/testing.ts
@@ -14,7 +14,7 @@ import { expandEndpoints } from './util';
 //   text: The text to display on the dropdown
 //   value: The actual hosted secure websocket endpoint
 
-export function createTesting (t: TFunction): LinkOption[] {
+export function createTesting (t: TFunction, firstOnly?: boolean): LinkOption[] {
   return expandEndpoints(t, [
     // alphabetical based on chain name, e.g. Amber, Arcadia, Beresheet, ...
     {
@@ -399,5 +399,5 @@ export function createTesting (t: TFunction): LinkOption[] {
         ZERO: 'wss://alphaville.zero.io'
       }
     }
-  ]);
+  ], firstOnly);
 }
diff --git a/packages/apps-config/src/endpoints/testingRelays.ts b/packages/apps-config/src/endpoints/testingRelays.ts
index a593aca521..6410894f85 100644
--- a/packages/apps-config/src/endpoints/testingRelays.ts
+++ b/packages/apps-config/src/endpoints/testingRelays.ts
@@ -8,9 +8,9 @@ import { createRococo } from './testingRelayRococo';
 import { createWestend } from './testingRelayWestend';
 import { expandEndpoints } from './util';
 
-export function createTestingRelays (t: TFunction): LinkOption[] {
+export function createTestingRelays (t: TFunction, firstOnly?: boolean): LinkOption[] {
   return expandEndpoints(t, [
     createRococo(t),
     createWestend(t)
-  ]);
+  ], firstOnly);
 }
diff --git a/packages/apps-config/src/endpoints/util.ts b/packages/apps-config/src/endpoints/util.ts
index ca0f2b361d..969e4b93ed 100644
--- a/packages/apps-config/src/endpoints/util.ts
+++ b/packages/apps-config/src/endpoints/util.ts
@@ -21,7 +21,7 @@ export function expandLinked (input: LinkOption[]): LinkOption[] {
   }, []);
 }
 
-export function expandEndpoint (t: TFunction, { dnslink, genesisHash, info, isChild, isDisabled, linked, paraId, providers, teleport, text }: EndpointOption): LinkOption[] {
+export function expandEndpoint (t: TFunction, { dnslink, genesisHash, info, isChild, isDisabled, linked, paraId, providers, teleport, text }: EndpointOption, firstOnly?: boolean): LinkOption[] {
   const base = {
     genesisHash,
     info,
@@ -32,19 +32,22 @@ export function expandEndpoint (t: TFunction, { dnslink, genesisHash, info, isCh
     text
   };
 
-  const result = Object.entries(providers).map(([host, value], index): LinkOption => ({
-    ...base,
-    dnslink: index === 0 ? dnslink : undefined,
-    isRelay: false,
-    textBy: t('rpc.hosted.by', 'hosted by {{host}}', { ns: 'apps-config', replace: { host } }),
-    value
-  }));
+  const result = Object
+    .entries(providers)
+    .filter((_, index) => !firstOnly || index === 0)
+    .map(([host, value], index): LinkOption => ({
+      ...base,
+      dnslink: index === 0 ? dnslink : undefined,
+      isRelay: false,
+      textBy: t('rpc.hosted.by', 'hosted by {{host}}', { ns: 'apps-config', replace: { host } }),
+      value
+    }));
 
   if (linked) {
     const last = result[result.length - 1];
     const options: LinkOption[] = [];
 
-    linked.forEach((o) => options.push(...expandEndpoint(t, o)));
+    linked.forEach((o) => options.push(...expandEndpoint(t, o, firstOnly)));
     last.isRelay = true;
     last.linked = options;
   }
@@ -52,6 +55,6 @@ export function expandEndpoint (t: TFunction, { dnslink, genesisHash, info, isCh
   return expandLinked(result);
 }
 
-export function expandEndpoints (t: TFunction, input: EndpointOption[]): LinkOption[] {
-  return input.reduce((result: LinkOption[], input) => result.concat(expandEndpoint(t, input)), []);
+export function expandEndpoints (t: TFunction, input: EndpointOption[], firstOnly?: boolean): LinkOption[] {
+  return input.reduce((result: LinkOption[], input) => result.concat(expandEndpoint(t, input, firstOnly)), []);
 }
diff --git a/packages/react-hooks/src/useTeleport.ts b/packages/react-hooks/src/useTeleport.ts
index ab9152d476..37ad110755 100644
--- a/packages/react-hooks/src/useTeleport.ts
+++ b/packages/react-hooks/src/useTeleport.ts
@@ -30,7 +30,7 @@ const DEFAULT_STATE: Teleport = {
   oneWay: []
 };
 
-const endpoints = createWsEndpoints((k: string, v: string | undefined) => v || k).filter((v): v is ExtLinkOption => !!v.teleport);
+const endpoints = createWsEndpoints((k: string, v?: string) => v || k).filter((v): v is ExtLinkOption => !!v.teleport);
 
 function extractRelayDestinations (relayGenesis: string, filter: (l: ExtLinkOption) => boolean): ExtLinkOption[] {
   return endpoints