[champion select] draft pick mastery bug

i was looking at my friends masteries in the profile menu, then the champion select started and suddenly i had his masteries! mine were gone i had to go to the edit masteries menu in the champion select to gain my masteries back! this is weird and has to be fixed otherwise i can't play with my masteries (i had to relog to gain back my masteries...) please riot fix this and answer to me this has happened to me 3 times already
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