The bug

When a panda is eating a pointed dripstone, the item floats out of the hands of the panda.

How to reproduce

Run the command:

/summon panda ~ ~ ~ {HandItems:[{id:"minecraft:pointed_dripstone",Count:1b},{}]} 

then, wait for the panda to eat. When it does, you'll notice how the item floats out of the hands of the panda when it is holding it up.