diff --git a/packages/apps-config/src/endpoints/productionRelayKusama.ts b/packages/apps-config/src/endpoints/productionRelayKusama.ts
index 56c1092495..a85673e0d1 100644
--- a/packages/apps-config/src/endpoints/productionRelayKusama.ts
+++ b/packages/apps-config/src/endpoints/productionRelayKusama.ts
@@ -92,7 +92,7 @@ export const prodParasKusama: EndpointOption[] = [
     paraId: 2012,
     text: 'Crust Shadow',
     providers: {
-      Crust: 'wss://rpc-shadow.crust.network/'
+      // Crust: 'wss://rpc-shadow.crust.network/' // https://github.com/polkadot-js/apps/issues/8355
     }
   },
   {
@@ -102,7 +102,8 @@ export const prodParasKusama: EndpointOption[] = [
     text: 'Crust Shadow 2',
     isUnreachable: true,
     providers: {
-      Crust: 'wss://rpc-shadow.crust.network/'
+      // also duplicated right above (hence marked unreachable)
+      // Crust: 'wss://rpc-shadow.crust.network/' // https://github.com/polkadot-js/apps/issues/8355
     }
   },
   {
@@ -334,7 +335,7 @@ export const prodParasKusama: EndpointOption[] = [
     paraId: 2085,
     text: 'Parallel Heiko',
     providers: {
-      OnFinality: 'wss://parallel-heiko.api.onfinality.io/public-ws',
+      // OnFinality: 'wss://parallel-heiko.api.onfinality.io/public-ws', // https://github.com/polkadot-js/apps/issues/8355
       Parallel: 'wss://heiko-rpc.parallel.fi'
     }
   },
diff --git a/packages/apps-config/src/endpoints/productionRelayPolkadot.ts b/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
index 3f2b41d04f..0c53c746e9 100644
--- a/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
+++ b/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
@@ -109,8 +109,8 @@ export const prodParasPolkadot: EndpointOption[] = [
     paraId: 2002,
     text: 'Clover',
     providers: {
-      Clover: 'wss://rpc-para.clover.finance',
-      OnFinality: 'wss://clover.api.onfinality.io/public-ws'
+      Clover: 'wss://rpc-para.clover.finance'
+      // OnFinality: 'wss://clover.api.onfinality.io/public-ws' // https://github.com/polkadot-js/apps/issues/8355
     }
   },
   {
@@ -332,7 +332,7 @@ export const prodParasPolkadot: EndpointOption[] = [
     paraId: 2012,
     text: 'Parallel',
     providers: {
-      OnFinality: 'wss://parallel.api.onfinality.io/public-ws',
+      // OnFinality: 'wss://parallel.api.onfinality.io/public-ws' // https://github.com/polkadot-js/apps/issues/8355
       Parallel: 'wss://rpc.parallel.fi'
     }
   },
diff --git a/packages/apps-config/src/endpoints/testingRelayRococo.ts b/packages/apps-config/src/endpoints/testingRelayRococo.ts
index 7a2b774697..fc84b2a533 100644
--- a/packages/apps-config/src/endpoints/testingRelayRococo.ts
+++ b/packages/apps-config/src/endpoints/testingRelayRococo.ts
@@ -124,7 +124,7 @@ export const testParasRococo: EndpointOption[] = [
     paraId: 4044,
     text: 'Frequency',
     providers: {
-      Frequency: 'wss://collator1.frequency.xyz'
+      // Frequency: 'wss://collator1.frequency.xyz' // https://github.com/polkadot-js/apps/issues/8355
     }
   },
   {