I can't leave during a fight

"Fantastic_Kleo;d-266388" wrote:
After I press the "Retreat" button, I have to wait another minute until I can leave the fight that is losing to me. During this time, my units are destroyed, and the battle is considered lost. And on the next run, enemy units have turn advantage.
When they fix the exit button, what would come out instantly?

As I recall, retreat happens on your next turn. If you are against a TM train team like troopers, force close is still only viable option to make sure.
The retreat button is a good addition to the game, but use airplane mode for any risky battle if you want to ensure no preload.