Had this happen in game. My flying unit moved in range of a crokadar guardians lockdown aura over an obstacle. My champ was stuck there the rest of the game. Even after crok moved back out of range. Cleansing aura and cleansing breath would not remove the grounded condition. I've played with this some in campaigns since. When crok moves into range the Earthbound passive ability and the grounded condition both appear on the champ. When crok moves back out of range Earthbound leaves the champ but grounded stays on.
I remember witnessing this bug last month with a slick and buzz getting perma-grounded by a tortun privateer's lockdown aura.
