Can't stomp in PvP
In my experience this is usually because of a glitch where it shows the enemy in a different spot than they actually are, it lets me stomp but like you it fails because technically there is nothing there.
Oh, yeah! I remember having this problem a while back, but not until recently has it become an issue again. Any fix for these cases, or are we stuck trying to blast down HP and hope our attacks are not “obstructed” somehow?