Allow for reimporting block+envelope in certain cases

beacon_node/network/src/network_beacon_processor/gossip_methods.rs

@@ -3715,7 +3715,6 @@ impl<T: BeaconChainTypes> NetworkBeaconProcessor<T> {
                     | EnvelopeError::BeaconStateError(_)
                     // The following variants are produced during envelope import, not gossip
                     // verification, so they cannot be reached here. Ignore them to be safe.
-                    | EnvelopeError::OptimisticSyncNotSupported { .. }
                     | EnvelopeError::BlockRootNotInForkChoice(_)
                     | EnvelopeError::InternalError(_) => {
                         self.propagate_validation_result(