FN key being triggered unexpectedly

Hi,

I have a shortcut set up for Preview to move the mouse and highlight text in blue, green etc. But this shortcut also seems to trigger the Fn key, for some reason, even though its only set to 1) move the mouse 2) pressing the arrow keys, and 3) press the enter key.

Right now i have another app (Pro mouse) that zooms in on the screen when I press Fn, and this is triggered when I use the before mentioned shortcut in Preview...

Screenshot 2025-20-04 at 13.53.38

arrow keys implicitly contain the fn key, maybe pro mouse recognizes these?

That must be it then! Thanks, it was driving me a bit crazy! And im guessing there is no way to circumvent this triggering the fn?