Left over from MC-127094.
It should display a hand animation like almost all other interactions.
Held items/blocks appears to bob down and up while opening horse's inventory
Arm animation is not executed in certain circumstances
Right clicking on redstone ore, which causes it to light up, plays no hand animation
Placing certain blocks next to entities is successful but plays no sound/does not animate the hand
Spawn eggs used on water do not display a hand animation
Making tamed parrots sit/stand plays no hand animation
Using the carrot on a stick while riding a pig plays no hand animation