Entered Hero Sandbox right when matchmaking popped and counted as me abandoning

[bramsey967]

Happened to click hero sandbox moments after the matchmaking queue popped. I loaded into the hero sandbox, no further notification about the mm queue. Left sand box, got a 5 minute "ban"

 

[Mandy]

Bumping this as I just had it happen to me today.

 

[cjflaherty4]

Had this happen to me just now today.