It's tied to the rewards drop. If you don't wait until the rewards drop; xp and glimmer. Than you'll get the match left early notice. Even if it's after commendation screen

For some reason you actually have to make sure you wait until the end screen then leave, if that doesn’t work then idk man

Yep then banned

[quote]Is anybody else getting the oops you left when you leave after the match is complete? I've had it after I've given commendations. Really sucks to get a loss on your trials card because of a software bug.[/quote] Unfortunately this happens, just stop playing for about a week, this usually solves the problem.