Skeleton entities do not move or set on fire during daytime.

When playing on Minecraft Survival Mode, I sometimes notice that Skeletons just stand still - you can't hit them, they don't react to your presence, they don't set on fire; they have 0 interaction with the world around them. But when I reload the game, they're gone. I find it strange. If anyone has any similar issues, comment on this issue 🙂