BF6 XP Booster Timing

Trying to wrap my head around EA's process for deciding timing for XP boosters. If a player earns a 15 minute (or maybe 30 or 60) XP boost that has been playing time in past titles. Right now if you select a XP boost, then select a game mode and wait for the system to get you into a game, you will have lost at least two minutes of that boost and possibly as much as 5 minutes. I get why the clock runs during a 'Double XP weekend" but for XP boosters earned? And it's not as if the XP boost is free. If you pre-ordered the game or bought the season pass, XP boosts are included in what you paid.