I wanted to clarify the zoom issue in case it didn't make sense. In the settings, accessibility, magnification gesture is the feature to triple tap and zoom in on any screen. I think it waiting for the quick inputs results in gaming keys not responding correctly. At least that's what happened on my turbo. I believe it was MC4 that I was playing and experiencing lag until I toggled off the magnification gesture. Worth a try anyhow.
Thanks for the clarification. Even though the triple-tap to zoom may not be the exact issue for the OP, it may be somehow related to screen taps in general or how they're handled internally. Just the fact that it had some impact on your situation points to possible cause.