Page_up, Page_down inputs not behaving as expected when combined with other keys

[salperinlea]

Using KDE 5.24.1, Arch linux with Kernel 5.16.9-1.

I have two shortcuts for activity switching that I like to link to touchpad gestures via libinput-gestures. These shortcuts are meta+shift+page_up and meta+shift+page_down. with xdotool in the config, there's no trouble; the commands are executed. Sadly, with ydotool, this isn't the case -- instead, something somewhat strange happens as a result:

(base) ➜  ~ ydotool key super+shift+page_up
ydotool: notice: Using ydotoold backend
Next delay was set to 50 milliseconds.
Key delay was set to 12 milliseconds.
Repeat was set to 1 times.
Repeat delay was set to 20 milliseconds.
^X@sP%                                            
(base) ➜  ~ sP

with identical results if using super+shift+page_down.

The intended effect of switching activities doesn't occur.