diff --git a/packages/apps-config/src/endpoints/productionRelayPolkadot.ts b/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
index e86e1f81db..b1e8189786 100644
--- a/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
+++ b/packages/apps-config/src/endpoints/productionRelayPolkadot.ts
@@ -991,7 +991,7 @@ export const prodParasPolkadotCommon: EndpointOption[] = [
       LuckyFriday: 'wss://rpc-people-polkadot.luckyfriday.io',
       OnFinality: 'wss://people-polkadot.api.onfinality.io/public-ws',
       Parity: 'wss://polkadot-people-rpc.polkadot.io',
-      RadiumBlock: 'wss://people-polkadot.public.curie.radiumblock.co/ws',
+      // RadiumBlock: 'wss://people-polkadot.public.curie.radiumblock.co/ws', // https://github.com/polkadot-js/apps/issues/11791
       Stakeworld: 'wss://dot-rpc.stakeworld.io/people'
     },
     relayName: 'polkadot',
diff --git a/packages/apps-config/src/endpoints/testing.ts b/packages/apps-config/src/endpoints/testing.ts
index 5403cbcf82..071aff842c 100644
--- a/packages/apps-config/src/endpoints/testing.ts
+++ b/packages/apps-config/src/endpoints/testing.ts
@@ -686,10 +686,10 @@ export const testChains: Omit<EndpointOption, 'teleport'>[] = [
   {
     info: 'opal',
     providers: {
-      'Geo Load Balancer': 'wss://ws-opal.unique.network',
-      'Unique America': 'wss://us-ws-opal.unique.network',
-      'Unique Asia': 'wss://asia-ws-opal.unique.network',
-      'Unique Europe': 'wss://eu-ws-opal.unique.network'
+      // 'Geo Load Balancer': 'wss://ws-opal.unique.network', // https://github.com/polkadot-js/apps/issues/11791
+      // 'Unique America': 'wss://us-ws-opal.unique.network', // https://github.com/polkadot-js/apps/issues/11791
+      // 'Unique Asia': 'wss://asia-ws-opal.unique.network', // https://github.com/polkadot-js/apps/issues/11791
+      // 'Unique Europe': 'wss://eu-ws-opal.unique.network' // https://github.com/polkadot-js/apps/issues/11791
     },
     text: 'OPAL by UNIQUE',
     ui: {