button triggers mousemove

I'm a web developer, and I'm building a website right now. I tried using my apple remote control (aliminium) with some button remapping to simulate key presses so i could navigate around on the website.

But i notices while testing this that a mousemove event is also triggered. Even doe the mouse is completely still.

Affected input device (e.g. MacBook Trackpad, Magic Mouse/Trackpad, Touch Bar, etc.):

Device information:

  • Type of Mac: Mac mini (late 2014)
  • macOS version: Big sur 11.0.1
  • BetterTouchTool version: 3.553 (1693)
  • Aliminium remote control

Demo: https://jsfiddle.net/cmpvk16e/2/
Skärmavbild 2021-03-05 kl. 13.21.50

I do not wish for this mousemove event to happen

I also tested a other thing with reassigning a keyboard shortcut in the new UI (pressing a to send key b). (in case you don't have the remote control) and it also produce a mousemove event