well not sure if its norm but im a huge fan of multi battle when i leave i use it. and yesterday i had that problem tho worse. it would complete the first multi battle then cancel. it did it about 10 times but i was persistant and it eventually stopped.

something also worth noting i play via plarium on pc

This has been happening for 2 weeks or so.  Primarily during multibattle the app will just close for no appearent reason. When you restart it it will tell you unfinished battle and ask if you'd like to send a report to plarium.  Out of 45 multibattles this will happen maybe 3 to 5 times which is very irritating.  I've also noticed a few times the app will close during arena actually even before the batle begins while the screen is turning before you even see the champs in the arena.  When you restart you get the same message, you have a loss, and the token has been taken.

Someone else posted about the multibattle issue not a week ago so I know i'm not the only one.

Oh sorry I didn't see someone posted about this before. Yeah, I get the error message saying I left before a battle ended....something like that. I was just wondering if it was happening to others and not just me.  Hopefully it gets solved soon

Yes it's a known bug and a solution will be implemented in a future patch ( I have no exact date ) 

Thanks Rufus.  Is the known bug the multi-battle failure or the loading crash during arena/tag battles? Or is it the same problem?  Losing 30 points multiple times in a week for tag can be the difference between advancing or not.  Regardless of the fix, the match shouldn't be counted if it never starts, tough enough to move up in tag as it is.