XP Boost cards are not correctly counted

I've encountered a bug with XP cards. Applied all my available career and hardware xp boost cards. Game nicely counted a total 3hours of boost for career and hardware too. Once i got out of that submenu that 3 hour instantly reverted to 1 hour and it does not seem to be a visual bug. Basically 2 hours of xp boost is lost now on my end. 

Please fix this. Either don't let people apply more than 1 hour of combined  xp boost cards, or fix this error. Personally i think it would be nice if i could just apply my xp boost cards and could then just forget about it. Let us stack and forget them. I really didn't like the BF4 way when we had to apply new xp boost cards in the middle of a game. Needless to say it was quite often just forgotten.