Affects Version/s: Minecraft 18w19a, Minecraft 1.13-pre8, Minecraft 1.13, Minecraft 18w30b
Fix Version/s: Minecraft 1.13.2
How to reproduce:
Spawn a skeleton underwater. Go to survival mode.
When you're out of water, the hostile skeleton will try to shoot you. However, I noticed when moving around left and right, that when the arrows do hit, they don't make any damage. They just ricochet back or drop to the ground.
However, if you stand still, then they do damage.