For anyone who might be interested, since in my case this problem is caused by fractional scaling, in my Ubuntu 20.04 (and then also 20.10) installation I was able to "automatically fix" it every login by using this very small program I developed: https://github.com/mind-overflow/gnome-fs-duplicate-cursor-fix
For anyone who might be interested, since in my case this problem is caused by fractional scaling, in my Ubuntu 20.04 (and then also 20.10) installation I was able to "automatically fix" it every login by using this very small program I developed: https:/ /github. com/mind- overflow/ gnome-fs- duplicate- cursor- fix