Instead of making loads of issue threads i decided to make an list of buggy mob A.I and mob problems, i will update this list when i find an A.I bug or problem, none of these have not been fixed yet, please tell me if i made an mistake or there is an bug you found in the comments

Enderman
Rarely when damaged by water they will teleport and go back to water and take more water damage

Zombie Pigman
When an mob attacks them they will not fight back

Ender Dragon
Will attack player in creative mode

Villager
Will not go inside when its raining
Rarely they will not go inside when its night or when there is thunder
Wrong villagers harvest crops
They have an habit of getting stuck next to walls

Iron Golem
Can attack mobs and players next to walls
Will not be immediately hostile to players with an low reputation

Zombie
Can attack players or villagers next to a door, fence, glass pane, and iron bars
Will not enter shade when burning in sunlight unlike skeletons

Skeleton and Wither Skeleton
Can shoot mobs and players next to fences, glass pane, and iron bars
Will not attack mobs if they have an sword

Endermite and Siverfish
Take damage on ender portals or soul sand

All Mobs
Will Walk into fire and cactus