Bug: Elo randomly dropped 200 points

Around an hour ago I won a game and my elo moved up to 820, I went back to the main menu, claimed a mission, and closed the game. When I opened the game on my phone around 50 minutes later I noticed my elo now displayed as 600, the very bottom of the great Leauge. I assumed this was a bug and it would correct after I played a game, but it didn't. Is there any way I could have my elo restored?