I just lost in the same battle twice. This happened to me a few weeks ago too. I had a chance to win, but got screwed and lost twice.
“I just lost twice in 12 seconds. 27 and 26 trophies, down 53 total. I swapped in my irex and lost before any action, game was tied 2-2. I then went to the home screen came back to battle screen and it joined me to a loosing screen 3-2.”
Hey Athlon, could you reach out to our support team here at firstname.lastname@example.org with your support key along with the date and time of when that happened, so our team can investigate further? In the meantime, trying some of the troubleshooting steps here could help in preventing this issue from happening again: Lost a battle I was winning