In my Xorg logs (e.g. Keyb/var/log/Xorg.0.log), I get messages like
[ 10491.518] (EE) event14 - VEN_04F3:00 04F3:311C Touchpad: kernel bug: Touch jump detected and discarded.
See https://wayland.freedesktop.org/libinput/doc/1.22.1/touchpad-jumping-cursors.html for details
But when I want to open this URL for details, I get a 404 error.
It seems that the value of the HTTP_DOC_LINK macro is incorrect:
at https://wayland.freedesktop.org/libinput/doc/ I can see various
directories such as "1.22.0" and "1.23.0", but not the "1.22.1" one.