diff --git a/cumulus/client/relay-chain-minimal-node/src/blockchain_rpc_client.rs b/cumulus/client/relay-chain-minimal-node/src/blockchain_rpc_client.rs
index fc4d803002cb2..9e0ba05b2a837 100644
--- a/cumulus/client/relay-chain-minimal-node/src/blockchain_rpc_client.rs
+++ b/cumulus/client/relay-chain-minimal-node/src/blockchain_rpc_client.rs
@@ -338,6 +338,13 @@ impl RuntimeApiSubsystemClient for BlockChainRpcClient {
 			.await?)
 	}
 
+	async fn disabled_validators(
+		&self,
+		at: Hash,
+	) -> Result<Vec<polkadot_primitives::ValidatorIndex>, ApiError> {
+		Ok(self.rpc_client.parachain_host_disabled_validators(at).await?)
+	}
+
 	async fn staging_async_backing_params(&self, at: Hash) -> Result<AsyncBackingParams, ApiError> {
 		Ok(self.rpc_client.parachain_host_staging_async_backing_params(at).await?)
 	}
diff --git a/cumulus/client/relay-chain-rpc-interface/src/rpc_client.rs b/cumulus/client/relay-chain-rpc-interface/src/rpc_client.rs
index b079294b78421..b73b718e3e83d 100644
--- a/cumulus/client/relay-chain-rpc-interface/src/rpc_client.rs
+++ b/cumulus/client/relay-chain-rpc-interface/src/rpc_client.rs
@@ -588,6 +588,14 @@ impl RelayChainRpcClient {
 			.await
 	}
 
+	pub async fn parachain_host_disabled_validators(
+		&self,
+		at: RelayHash,
+	) -> Result<Vec<ValidatorIndex>, RelayChainError> {
+		self.call_remote_runtime_function("ParachainHost_disabled_validators", at, None::<()>)
+			.await
+	}
+
 	#[allow(missing_docs)]
 	pub async fn parachain_host_staging_async_backing_params(
 		&self,
diff --git a/cumulus/parachains/integration-tests/emulated/common/src/lib.rs b/cumulus/parachains/integration-tests/emulated/common/src/lib.rs
index f6d589700360c..f0f7aee1fb4fd 100644
--- a/cumulus/parachains/integration-tests/emulated/common/src/lib.rs
+++ b/cumulus/parachains/integration-tests/emulated/common/src/lib.rs
@@ -19,6 +19,7 @@ pub use impls::{RococoWococoMessageHandler, WococoRococoMessageHandler};
 pub use parachains_common::{AccountId, Balance};
 pub use paste;
 use polkadot_parachain::primitives::HrmpChannelId;
+use polkadot_primitives::runtime_api::runtime_decl_for_parachain_host::ParachainHostV6;
 pub use polkadot_runtime_parachains::inclusion::{AggregateMessageOrigin, UmpQueueId};
 pub use sp_core::{sr25519, storage::Storage, Get};
 use sp_tracing;
diff --git a/polkadot/node/core/runtime-api/src/cache.rs b/polkadot/node/core/runtime-api/src/cache.rs
index c90f15992fcfb..896ef3f8e0d8e 100644
--- a/polkadot/node/core/runtime-api/src/cache.rs
+++ b/polkadot/node/core/runtime-api/src/cache.rs
@@ -65,7 +65,7 @@ pub(crate) struct RequestResultCache {
 		LruMap<Hash, Vec<(SessionIndex, CandidateHash, vstaging::slashing::PendingSlashes)>>,
 	key_ownership_proof:
 		LruMap<(Hash, ValidatorId), Option<vstaging::slashing::OpaqueKeyOwnershipProof>>,
-	disabled_validators: LruCache<Hash, Vec<ValidatorIndex>>,
+	disabled_validators: LruMap<Hash, Vec<ValidatorIndex>>,
 
 	staging_para_backing_state: LruMap<(Hash, ParaId), Option<vstaging::BackingState>>,
 	staging_async_backing_params: LruMap<Hash, vstaging::AsyncBackingParams>,
@@ -98,7 +98,7 @@ impl Default for RequestResultCache {
 			disputes: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
 			unapplied_slashes: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
 			key_ownership_proof: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
-			disabled_validators: LruCache::new(DEFAULT_CACHE_CAP),
+			disabled_validators: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
 
 			staging_para_backing_state: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
 			staging_async_backing_params: LruMap::new(ByLength::new(DEFAULT_CACHE_CAP)),
@@ -440,7 +440,7 @@ impl RequestResultCache {
 		&mut self,
 		relay_parent: &Hash,
 	) -> Option<&Vec<ValidatorIndex>> {
-		self.disabled_validators.get(relay_parent)
+		self.disabled_validators.get(relay_parent).map(|v| &*v)
 	}
 
 	pub(crate) fn cache_disabled_validators(
@@ -448,7 +448,7 @@ impl RequestResultCache {
 		relay_parent: Hash,
 		disabled_validators: Vec<ValidatorIndex>,
 	) {
-		self.disabled_validators.put(relay_parent, disabled_validators);
+		self.disabled_validators.insert(relay_parent, disabled_validators);
 	}
 
 	pub(crate) fn staging_para_backing_state(