Mysterio crit failing

Clone

I was fighting Domino in arena using Mysterio and i received critical failure from a dex.
This has never happened previously and his info states he is immune to ability accuracy reduction so surely he should never crit fail?
Am i wrong in believing this is a bug?

ChopstickWarrior

Any officials who can have a look into this?

Blenton1811

Yeah bro! Just almost died in aw cause of that! Luckily had a boost.