I know you are super top end computer security and all…
Top of the line when comes the time to finds out what is s treat and whats not but looks like you gonna need a some help there…
No that is not what he is saying.
There is a known bug in it and avast is already working on it.
Disable it for know and enable it again after avast has released the fix for it.
I played Diablo 3 and have never seen a popup regarding its a virus but what youre describing to me sounds more like it was added to the gaming mode section of avast.