I don't know if this is it, but JulioNIB's flash mod 2.0+ changes "Q" to an ability selector when active.
Best posts made by Bloodbullet10
RE: Just realized today that I cannot access my radio wheel anymore
RE: Cigarette in Face - JulioNIB's Superman Mod
@eshenk I wanted to make sure it wasn't a "me thing" so I looked up videos of people using the mod and saw that they had the issue as well. If you go to this video
You'll see a small white thing come out of the guy's face at around the 31:35 mark when he toggles the powers off.