Seriously what is going on with heavy attacks at random

This has been an ongoing issue. But every champ is randomly doing heavy attacks when your not trying to do them. Its getting quite annoying. I think the length of time needed to do a heavy is off. Please adjust and fix this.
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I had that once, I know my thumb wasn't even close to pressing the button.
I frequently do.
You got flagged for some reason, but you're right. It happens to me every now and then and it's the first thing I do. Not just the exterior, either. I fully take off my case, clean the base screen, and then both sides of the protector and it always stops.