I suggest adding a dedicated “Return To Battle” button somewhere in the hangar that is there regardless your battle status.
I’ve found that lately. If you are ejected from battle, it is largely impossible to return to battle because your silly alert does not pop up.
This button would also fix a lot of the “disconnected” players because I have a feeling that most of them have experienced this same issue. The inability to return to battle is a huge disadvantage to not only your team, but you too, as you still must pay for ammo and repairs if applicable. This paired with the fact that you get no rewards makes this a financial issue as well, pushing this issue up on the priority list.