Double XP Booster lost.. and hey i'm new

Yeah Lifetime Double XP Booster… Bought Season 3 Ultra Edition… Bug… ? Because i lost my Lifetime Double XP Booster… In the character selection it’s there but not anymore if i play a match… Help me please.

XP booster only works if you are logged in Xbox Live (even if you are playing offline modes).

I am always signed in xbox live… But thanks for the help.