Ubuntu 20.04 and 21.04: second cursor stuck on the screen 150% fractional scaling on a 1440p monitor after login (XOrg)

[Renaissance]

If "fractional scaling" is set to 150%, then after login there is a second cursor stuck on the screen. Confirmed on both Ubuntu 20.04 and 21.04.

It is possible to fix it by switching back to 100% scaling and then set 150% again (every time you log in). Or, probably, have it as a startup script which I could not figure yet.

Using Wayland is not an option for me because of reasons: lack of support from certain software such as IntelliJ IDEA so everything is blurry there with scaling enabled plus a couple of other issues.

An example photo of this issue can be found in one of AskUbuntu threads: https://i.stack.imgur.com/Kiyw2.jpg (source thread is https://askubuntu.com/questions/1292780/fractional-scaling-creates-another-mouse-pointer)

ProblemType: Bug
DistroRelease: Ubuntu 21.04
Package: gnome-shell 3.38.4-1ubuntu2
ProcVersionSignature: Ubuntu 5.11.0-16.17-generic 5.11.12
Uname: Linux 5.11.0-16-generic x86_64
ApportVersion: 2.20.11-0ubuntu65
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Sun May 2 12:20:29 2021
DisplayManager: gdm3
InstallationDate: Installed on 2020-12-15 (137 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
RelatedPackageVersions: mutter-common 3.38.4-1ubuntu2
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to hirsute on 2021-05-01 (0 days ago)

[Daniel van Vugt (vanvugt)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. This particular bug has already been reported and is a duplicate of bug 1873052, so it is being marked as such. Please look at the other bug report to see if there is any missing information that you can provide, or to see if there is a workaround for the bug. Additionally, any further discussion regarding the bug should occur in the other report. Feel free to continue to report any other bugs you may find.