Not sure if this is a bug or if I changed something in the settings:
When I use for example "TipTap 3 Fingers Fixed" the gesture is recognised correctly but it also performs a single tab (left click).
Similar thing also happens with "3 Finger Swipe Up/Down" that works but also make a "2 Finger Swipe" (Scroll up/down).
I think this behaviour is pretty new. Maybe happened as I updated to Mojave but not sure.
MacBook Pro Trackpad