My visemes don't work when I'm playing a gesture, e.g. the gesture in Handgun.

I'm not figuring out how to enable the visemes when playing one of the gestures. It only works on the default gesture.
I thought I just had to check "Mouth & Jaw" to "Tracking" in the VRC Animation Tracking Control (image related)? Or am I missing somewhere else where I also need to activate it?