SUMMARY
When using one of the two-finger gestures (in MacOS - pinch to zoom, swipe to pan etc.), the canvas reacts as if all the gestures have been made at the same time.

STEPS TO REPRODUCE
1. Open a document
2. Use a two finger gesture on the canvas (i.e. two finger-swipe for panning, pinch to zoom and two finger rotate - default gestures in MacOS)

OBSERVED RESULT
Instead of the expected effect of one gesture (i.e. panning), the canvas reacts as if all the gestures have been made at the same time - when I pan with two finers swipe, the canvas pans, zooms and rotates at the same time. There is some lagging as well - that is, the movement of the canvas continues even when I stop moving my fingers.

EXPECTED RESULT
The expected result of the gesture - panning when I swipe, zooming when I pinch, rotating when I rotate.

SOFTWARE/OS VERSIONS
Windows: 
macOS: Mac OS X 10.14.6
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
I tested this behavior on my MacBookPro's trackpad, as well as on an external Apple trackpad.
This erratic behavior is new as of version 4.2.4 of Krita and is still present in 4.2.5.
It wasn't there in 4.2.3.