Confirmed (using Apple Magic Trackpad) that two-finger scrolling is non-responsive in webbrowser-app and System Settings. But I have also verified that two-finger scrolling still works in Xmir and native GTK apps. So the regression is specific to Qt.
Confirmed (using Apple Magic Trackpad) that two-finger scrolling is non-responsive in webbrowser-app and System Settings. But I have also verified that two-finger scrolling still works in Xmir and native GTK apps. So the regression is specific to Qt.