Zardnaar
Legend
I'm fine with it working repeatedly. Just don't do it from the exact same place in subsequent rounds or you'll be making the Dexterity (Stealth) check at disadvantage. Move somewhere else you can hide and you won't. Up to you.
If the opponents know the halfling us there can't they move until halfling no longer has cover then they're not hidden?
Afaik hiding isn't like greater invisibility. I assumed once you attacked that breaks the hiding effect.