Affects Version/s: 19w46b, 1.16.4, 20w51a, 21w03a, 21w05a
Fix Version/s: None
Signs stuck on walls under water can block pathfinding for bees.
1. Create a 2x2 hole, 3 deep.
2. Put signs on the walls of the middle layer and fill the hole with water.
3. Spawn a bee in the waterfilled block under a sign.
4. Observe that often the bee will get stuck until it suffocates, it's pathfinding stuck at the sign.
I was not able to reproduce this beehaviour without filling the hole with water.