The bug has been very annoying after the last update. You play a ranked match and next thing you know the whole game crashes. Here's a simple tip on how to avoid it.

After you play a match it synchronizes with the game every time, but the difference after playing ranked is that it automatically opens the League tab. This is what makes the game crash after a few seconds.

This is a MANUAL operation and has to be redone every time you play a ranked match, but the time it takes is very small compared to getting the game to crash and THEN open the game and play ranked.

What to do? just press Esc when it starts trying to load the whole League tab (after it syncs with your Armory) so it stops. This isn't over yet. Now open the Tutorial tab and start a training match (the whole process is clicking Tutorial and then Start Training) and press Esc after the loading screen with an image and confirm exit. You'll be booted out and now you're in the main screen again. Click Online Match and play!

If you liked my guide and hate the penalty system, you should check out my other guide here

That's all.