Sometimes, my item frames or experience disappear, and I have to exit the world and re-enter it for them to appear again. Pretty strange visual bug.

I’ve heard of people having the item frame issue in vanilla, but I’m not sure about the experience issue.

sorry for lack of response earlier, if this is still happening in 5.6+ please let us know in a new ticket

might have been related to the "terrain animations" lag that was recently resolved as well