So basically, my friends and I tried for many hours to upload and play on our realm yesterday to celebrate the release of 1.16. Once it finally let us on, however, we started noticing more issues. The realm kept crashing, kicking us out, and reverting our inventory to what it was previously. After a few hours of waiting to see if it resolved itself, we got back on and played more. After I logged off, however, my friend shared screenshots that displayed how he lost all of his progress after logging off, without dying. The bug seems to happen whenever someone logs off or is kicked out of the realm.

Unfortunately, I wish I had screenshots of this, but since the crashing stopped I forgot to grab some. I'll see if I can get some though.