As found out by PhoenixSC, rendering a large amount of slime blocks or honey blocks will result on a game crash
Steps to reproduce:
↪ Join a world on 21w13a or 21w14a
↪ Run /fill -20 -10 -20 10 10 10 slime_block
↪ Move around a bit
✖ Game crashes
The crashs report are of 21w13a [with FabricMC mappings] and 21w14a [Vanilla]
Dupe of MC-222517