diff --git a/yarn-project/validator-client/src/validator.ts b/yarn-project/validator-client/src/validator.ts
index 5cedbd0370e1..682aaf6997ed 100644
--- a/yarn-project/validator-client/src/validator.ts
+++ b/yarn-project/validator-client/src/validator.ts
@@ -352,6 +352,15 @@ export class ValidatorClient extends (EventEmitter as new () => WatcherEmitter)
       return false;
     }
 
+    // Ignore proposals from ourselves (may happen in HA setups)
+    if (this.getValidatorAddresses().some(addr => addr.equals(proposer))) {
+      this.log.warn(`Ignoring block proposal from self for slot ${slotNumber}`, {
+        proposer: proposer.toString(),
+        slotNumber,
+      });
+      return false;
+    }
+
     // Check if we're in the committee (for metrics purposes)
     const inCommittee = await this.epochCache.filterInCommittee(slotNumber, this.getValidatorAddresses());
     const partOfCommittee = inCommittee.length > 0;
@@ -453,6 +462,15 @@ export class ValidatorClient extends (EventEmitter as new () => WatcherEmitter)
       return undefined;
     }
 
+    // Ignore proposals from ourselves (may happen in HA setups)
+    if (this.getValidatorAddresses().some(addr => addr.equals(proposer))) {
+      this.log.warn(`Ignoring block proposal from self for slot ${slotNumber}`, {
+        proposer: proposer.toString(),
+        slotNumber,
+      });
+      return undefined;
+    }
+
     // Check that I have any address in current committee before attesting
     const inCommittee = await this.epochCache.filterInCommittee(slotNumber, this.getValidatorAddresses());
     const partOfCommittee = inCommittee.length > 0;