Mobs using an avoid_block or avoid_mob behavior will not path over the edge of blocks with buttons, signs, or trap doors on their sides.

Steps to reproduce:

1. Create a 5x5 platform.
2. Surround the outer edges with buttons, trap doors, or signs.
3. Spawn either a piglin and place a soul torch in the middle, or spawn a creeper and spawn a cat.

Expected result:

The piglin or creeper walks off the platform.

Actual result:

The mob goes into avoiding mode, but stops at the edge of the blocks, rather than running off of them as per both Java edition, and previous versions of Minecraft.

Impact:

This is currently breaking cat based creeper farms, and preventing the creation of effective zombified pigmen farms (due to needing to remove the piglins)