(Fixed) Unknown Name Leads To No Realm Access?

(The issue was fixed but can happen again.)

I joined my realm to see that there were two "Unknown Name" resource packs I didn't add. I tried removing them but the game wouldn't let me. As I played, the realm slowed down and affected instant building of blocks. I was kicked later on and I cannot join my realm now. I restarted the game and it did no effect, and I can confirm that my device is not the problem.