Most FFA games do not count for the ladder. (A loading error occurs after the game.)
Some FFA games do count, but then oftentimes losses count as wins.
This behavious exists since a long time. All FFA players are affected by it.
Dear developers, it would be great if you could fix this. There are still many players interested in FFA. It’s an amazing game mode and we would like to have a working ladder (score board).