Second (dead) mouse pointer on screen after applying fractional scaling

After setting fractional scaling to 150%, a dead mouse pointer stays visible on screen. It is smaller than the functional one (it seems to be the size it should have at 100%).

My configuration:
- Ubuntu 20.04
- AMD Radeon 5700 XT using open source drivers
- Logitech MX Master 3 over Bluetooth
- 4k LG Monitor

I saw similar bugs reported for other hardware configs, but they got closed/duped (with a request to reopen, so I am doing that here):
- Nvidia: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1827428
- https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1829221

I see the following work-arounds:
 - Move the mouse to the bottom right edge of the screen. This needs to be done on every login however, as the login screen itself is at 100%
 - Install a mainline kernel (I tried 5.6 and didn't see the issue with it) - however, that breaks other things

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.1-5ubuntu2
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Tue May 12 12:44:34 2020
DisplayManager: gdm3
InstallationDate: Installed on 2019-12-10 (154 days ago)
InstallationMedia: Ubuntu 19.10 "Eoan Ermine" - Release amd64 (20191017)
RelatedPackageVersions: mutter-common 3.36.1-3ubuntu3
SourcePackage: gnome-shell
UpgradeStatus: Upgraded to focal on 2020-04-25 (17 days ago)