PVP matches crash or freeze the app. If it doesn’t completely freeze, it gets stuck in a loading loop at 50%. Counts every single one as a loss. My honor is destroyed now.
In addition to a description of the bug you are reporting, please provide:
I also have many issues with pvp in 4.0.0. Many lags/bugs
I have the same issue:
iPhone 12 mini
iOs 17.2.1
I lost 500 rank point because of this issue. 
Hey Blizzard, Maybe fix the issue that is making your game basically unplayable? PVP is the only thing to do at my level to get decent experience for minis. Quests are a joke and utterly boring. I’ve spent $$ and I refuse to spend more on a broken game just get get my minis leveled up and not be able to PvP because 50% the game will crash. There’s YouTube videos dude, watch them.
I cannot post in the main because of the… limit of three posts? Lol. What a ridiculous situation blizzard.
Anyway I am still crashing.
iOS 4.0.0.84732/85211
That is an older build.
Download the game through the Battle.net App and it should give you the latest non-crashing version.