Masteries bug

Recently, I played 4-5 games with Zac my jungle main and at everytimes my masteries had the wrong ability. Usually, I use my Elise masteries and thoses masteries have Thunderlord's Decree. But when I spawn in the game and press TAB it says that I have Warlord's Bloodlust. After 1 game I went to look at my masteries page and everything was fine. Even before the game in the champion select I went to check in my masteries and there was still Thunderlord's Decree. That bug completely destroyed me in game hope Riot fix this. Thank you for the support and excuse my bad english !