This is probably common knowledge but I just realized this. There are probably other spots in the game the sameway.
I just noticed I can open boxes / chests in the Danger Room Hub and my buff timers all freeze (like normal hubs).
This is great when my inventory is full from cosmic patrols. I just head there and open all my chests and take my time without worry about my xp,rif,sif etc buffs continuing counting down.