Another Morde bug? Who woulda thought?

I was playing a game against Mordekaiser before and we were in the mid lane. He got a double kill then 3 people on my team dc'd at the same exact time. This could just be a massive coincidence but knowing Mordekaiser it probably isn't.

Also, the 3 of them came back about 30 seconds later at the same exact time and didn't know why they dc'd.