Hi,
Thanks for your application.
When I use the "Highly visible click" under Ubuntu 20.04 Mate edition, the highlight position is not where I clicked but a position before : if I maintain the click and I move the mouse, the position is good and now it is the position memorized for newer clicks.

So, this function can't be used in this state because of the gap between the real mouse position and the highlight.
Regards.