Is where any way to track mouse position while mouse buttons are pressed?

Hi! When I press LMB or RMB - I try to get mouse position, but it seems that values of mouse position don’t changes properly. Input mode is set to “Game and UI”. Basic logic - when mouse button pressed → ‘Event tick’ starts print string with ‘Get mouse position’ value, and those values changes about 5 in both directions from position there click starts. When I click in different areas of screen - initial position of mouse is correct accordingly to my screen size.

I have the same issue. That is strange actually since there should definitely be a way to implement RTS like area selector