Mistwell
Crusty Old Meatwad
Invisibility is a weird case for this discussion. Mechanically, the only reason to Hide while invisible is to get away, which implies movement. You already attack with advantage, so hiding doesn't add anything combat-wise.
What? You seriously cannot think of any reason why you would hide while invisible, other than for attacking?
That said... yes, absolutely, in my game you'd have to move to take the Hide action if you position as been revealed, for it to have any narratively meaningful result.
OK, but that's clearly a house rule. We know the rule on Invisibility - you don't need to move to hide again while invisible, and that specific rule automatically trumps the general hiding rules.
Otherwise, what happens? The creature has to make a Perception check to attack the spot where it already noticed you and thinks you are still?
Yes. Because you might have moved (even if just within the square), and it cannot be sure where you are. It can attack a 5-foot area anyway, but it can always do that whether or not you are there.
I'm not saying you'd have to move across the room... just not be in the same place you were, even if it's just a side-step. In fact, that's the most logical action, to get the attacker focused on the wrong space, which is again, why invisibility is a weird case (Even in the rules it mentions "signs of it's passage" when talking about hiding and invisibility.)
You occupy a 5 foot square, but you are not actually five feet wide. There is plenty of space within that five feet of area to move around. Hence, you need to spot someone.
I wouldn't call that a "great" example, unless you meant to prove my point![]()
It was a great example, as for me the halfling is the equivalent of invisible when behind a larger creature. It's their special ability.
To me "Hide" implies to conceal your actual location from the enemy, which you simply can't do if they know where you are and you stay there. You have to be somewhere else, which takes movement if you've already been discovered. You get advantage when you're attacking from where they don't expect you, like if you climbed up or slunk into the tall grass when you were out of sight behind the tree.
And all that sounds like a house rule to me.