When a pillager loads its crossbow, it does not slow down like the player does when loading a crossbow.
MC-138458
Pillagers do not slow down while loading their crossbows
Resolved
Fixed
5
Unconfirmed
Minecraft 18w43b, Minecraft 18w43c, Minecraft 18w44a, Minecraft 18w45a
Minecraft 18w46a
Retrieved
This seems to no longer happen in 18w46a. (assuming that pillagers slowing down to load, stopping to aim, and then shooting is intended)