I'm not sure what the cause of this bug is, but in one of my worlds, the game will sometimes freeze when looking at beds, and rarely, other blocks. It seems to happen more commonly after pausing, but other than that, i have yet to identify a cause. Because the game doesn't technically crash, there's no crash report that i can read. I've tried recreating the conditions in similar ways in another world, but it doesn't seem to trigger there. I've attached a few logs, 2021-04-25-6 being one in which my game froze, latest being a failed attempt at recreating it, and latest-1 being another attempt in the same world without my resource packs, to see if they had anything to do with the problem (it seems like they didn't).

The pictures below are after these freezes. This is the only environment in which i've gotten the bug to trigger. I'd send the world over, but it's too big for me to attach.

The bug also happens in 21w15a, but i'm unable to select that as an affected version.

EDIT: I might need some more testing to be completely sure, but switching my graphics from Fabulous to Fancy seems to stop the bug from occurring. Maybe this might have something to do with it?

EDIT 2: Tested again in 21w17a, and the issue still occurs. I've also noticed an increased amount of visual glitches in block outlines when switching from fancy back to fabulous graphics, both in this version and the previous.