Matched twice at the same time
On the android app, I was attempting to start a ranked match. I matched with someone and was able to pick heads or tails, but I then got a second match found screen (where it shows you and your opponent) with a different player. The app never moved from the match found screen to either match, but while the match found screen was displayed in the foreground, I was able to tap around in elements in the background of what I assume was the first match, i.e. to see close ups of cards in my hand, go to the settings menu, etc.
Since I was able to tap around, I managed to concede one of the matches, but it still didn't proceed from the match found screen to the other match, so I had to close the app. When I reopened it, I had lost ranking points for both matches.