Can't minimize while loading

I don't know where to put this, if it's already been brought up, or even if it's a bug or working as intended, I just want to mention that whenever I'm transitioning from one map to another, I'm unable to to minimize the game. It's not the case on holodeck and I've not tried it on redshirt, but on Tribble it is so. I know it's minor and everything, but sometimes when it's taking a bit to load I like to go check on other things, and I'd like to be able to do so without hitting the start menu key on my keyboard. The game can be minimized while on a map, just not during transition.