Sounds to me like the scene has the built-in FPS Controller, as I remember it using a forced lockCursor on program start, thus negating any showCursor calls.
I’d suggest either changing the script so that it doesn’t show/hide the cursor or creating your own scripts that do the same thing.
Thx you are right. I used M2H’s guide’s some example’s game setup script and it used Screen.lockcursor. I didn’t know this function so I didn’t found myself. But your 1 word save me.