I don't box hack but...Why do I get boxes in every game I play? Is it an event?

EDIT: I don't have lucky aura on. My problem is that I'm getting drops every single sector I play. I don't have anything to do with cheating installed on my computer, and I definitely do not want to get banned.

Ok, so I was playing level 57. Then I noticed I was getting boxes every single match. All of the sudden it says that I've been recorded for box hacking.

I think it may have been a bug that I was getting boxes every game, but I'm not too sure.