[pilif]

those toolkits do not support smooth scrolling.

The issue comes from XInput2 (https://www.x.org/releases/X11R7.7/doc/inputproto/XI2proto.t...)

So I guess the "fix" would be to have two completely separate input handlers on X11, one of which supporting smooth scrolling and multitouch, the other not and then offering users a toggle in the style of

[ ] do not ignore the first scroll input after focus loss, but disable smooth scrolling and multitouch

Plus handling all the potential issues by having two separate input handlers.

That's asking a bit much for this particular issue und greatly smells like a case of XKCD 1172