There’s an issue with revenge systems on iOS, people will install the game and sync their profile on a handful of devices, ipads/iphones, boot them up and queue the fight, then win it a few times in a row to abuse the elo system.
It’s just annoying seeing the same people hit me for 2 wins if I fight them back. This morning I noticed 3 sets of people each getting two wins in a row against me, and it’s happened before too.