The bug
Dolphins are sometimes rendered offset when they are jumping on land (and maybe rarely when turning in water as well).
This can be seen best when hitboxes are visible (F3 + B).
MC-130125
Dolphins are sometimes rendered offset when jumping on land
Resolved
Fixed
4
(Unassigned)
Confirmed
(Unassigned)
dolphin
Minecraft 18w21a, Minecraft 18w21b, Minecraft 1.13-pre1, Minecraft 1.13.1, Minecraft 1.13.2
Minecraft 19w13b
Retrieved
Was able to reproduce in 1.13.2, but not in 19w13b and 19w14a. So this has been fixed somewhere between 1.13.2 and 19w13b.