Mastery randomly turning off
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So.. i got a problem and i dont know if it happens to other people but basically its a bug (i guess) where my mastery randomly turns off. I cant parry or activate dexterity and my champions get decimated. If someone could help me it would be much appreciated. Also uploading 2 photos of the problem. The top of my roster is mostly r4 and it usually has around 7.6-8k PI. 
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https://forums.playcontestofchampions.com/en/discussion/263263/incursions-removing-masteries-and-boosts-hotfix-out-today#latest