Unknown Pack appears in realm after exit when add other packs.

When I add any normal addon it's fine, but then once I leave my realm, I cant join back again because it is stuck on "Loading Resources" the cause of this is because, for some reason it self adds a "Unknown Name" behavior and resource pack. No matter how many times I remove the "Unknown Pack" it comes back. This isn't just one addon, its every addon I add to my realm.