I dont know if this bug has been reported, but when I'm doing SP1 on Gambit, half of the animation is not there and the attack does not work.
You will see that it's working a couple of time and the last time I used it, at the end of the fight, it didnt work.
It happens, at least, once in every fight.
I'm on a Sony Xperia z2 tablet running Android 6.01
https://youtu.be/c3r3cQ2q9gE