Skeleton is damaged > it charges its bow as if it was holding it like a player without charging it.
Here is proof in video form (This is not a malicious link, this is footage of the bug happening) > https://medal.tv/games/minecraft/clips/kOd0EbSu47QFUG0JR?invite=cr-MSxHVHksMzEzMzcxNDYy
Environment
So far this bug has happened in the beach biome.
I experimented more with the bug and it turns out that it randomly happens with skeletons, and it occurs in all biomes (I believe the skeletons must spawn naturally in order to recreate this bug).