I have the same problem, every 3rd or 4th fight the game crshes on my PC after the Livepatch. Equal if i play campaign or dungeon. On my smartphone it´s still all fine, no crashes.
I'm farming arcane keep today for some Potions and it keeps crashing down.
The Raid application just closes. I've used the send report option of unfinished battle for some of them, but is getting frustrating. I have no clue how much energy I've lost today because of this bug.
I will try reinstall to see if it fixes it, but I don't have high hopes.
Update: After the reinstall I have the same problems.