Some of the mob animations are broken, as keyframes are being used as regular frames instead.
Affected mobs (may be incomplete):
-Chicken (Flapping wings)
-Parrot (Flapping wings)
-Shulker (Opening/Closing shell)
MCPE-43528
Some of the mob animations have low framerate
Resolved
Duplicate
3
(Unassigned)
Unconfirmed
Windows
Windows 10
1.13.0.1 Beta, 1.12.0.14 Beta, 1.12.0.13 Beta, 1.11.0.10 Beta, 1.11.0.5 Beta, , 1.12.0.3 Beta, 1.12.0.4 Beta, 1.11.1, 1.11.2, 1.11.4
Retrieved
There is one mob animation which is glitchy, and it is the vindicator's though it is not clunky. See MCPE-43643