Shearing sheep does not display hand animation again

I can confirm that the sheep shearing animation in 20w15a and 20w16a is the same as it was in 1.14.4. (In creative, the shears don't move at all. In survival, the shears bob down and back up.) The sheep shearing animation in 20w14a is the same as it was in 1.15.2. (In both creative and survival, the shears swing forward.) Thus, the sheep half of MC-160896 regressed in 20w15a. I also tested shearing mooshrooms in 20w15a and 20w16a. The mooshroom shearing animation is correct. (The shears swing forward.)

Possible clones MC-160896

20w17a is affected.