Blackshot Mastery Bug

I juz quit a game to rejoin and i juz wanna check my exp and saw my mastery all Elite5th and 4th .. In my shop > Item all got silencer for shotgun pistol rifle sniper all silencers (4get take ss) then i tot it would stay .. then when i rejoin the server go to my shop and see silencers goneee!!! and my mastery is back to normal ... zzzzzzzzzzz fk!!!!! .... I tot it was my dream came thru

same like me sia