Warden unswarmable

I believe this ticket is a duplicate of MC-250111 which was later resolved as "Cannot Reproduce". As a result of MC-2432 (which is working as intended), if an entity were to kill a given entity with a singular blow, nearby entities of the same kind would not be aggressive towards the killer, and this is intentional. Since wardens can one-shot zombified piglins and bees, nearby entities of the same kind will not become aggressive to the warden.

If you were to give the zombified piglins and/or bees additional health to resist a singular attack from the warden, you'd notice that the given entities turn aggressive towards it.

Does MC-250111 describe your issue?