I have mentioned this before and observed it again in greater detail. When an opponent casts a Planeswalker the client may stop recognizing your ability to attack and may also stop triggered abilities upon summoning. In sum, Planeswalker cards break the game. They should be banned until a fix is made. Otherwise it is merely an exploit. I play on IOS. This particular match involved my opponent playing a Planeswalker and I countered with a Skeleton Archer to eliminate a token. The ability did not trigger. I later played Soulhunter Rashka and that ability didn’t trigger either. Losing 6 planned direct damage points in a match basically throws the entire point of strategy games out of the window. I love this game. Fix it, Wizards!!!