Spinning mouse cursor is invisible when zoom is enabled

[Pavarin Bhandtivej]

I have enabled the zoom accessibility feature in GNOME Settings in Ubuntu 18.04.2, but the mouse cursor will be missing every time the mouse cursor changes to the spinning one (e.g. when the application is doing some tasks in the background or when the application is not responding). Mouse cursor will be visible again when the cursor changes back to the normal mouse pointer. This happens in both Ubuntu (Ambiance-themed) session and the communitheme session. With regard to the display server, It happens in X.Org, but in Wayland, the spinning cursor is visible but is not spinning. (It stays still)

Please note that this bug is not related to the bug https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1767648 and the proposed update for that bug as this newly-reported bug happens both before and after I install the update. Another observation is that the bug may be specific to Ubuntu as I previously installed Arch Linux and didn't notice this issue.

Steps to reproduce.
1. Go to Settings > Universal Access > Zoom and enable it.
2. Do something that would normally change mouse cursor to the spinning one. (e.g. open Synaptic Package Manager)
3. When the package list is loading, instead of seeing a spinning cursor, the mouse cursor becomes invisible.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: gnome-shell 3.28.3-0ubuntu0.18.04.4
ProcVersionSignature: Ubuntu 4.15.0-45.48-generic 4.15.18
Uname: Linux 4.15.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: communitheme:ubuntu:GNOME
Date: Tue Feb 26 00:58:52 2019
DisplayManager: gdm3
GsettingsChanges:
 b'org.gnome.desktop.interface' b'gtk-im-module' b"'gtk-im-context-simple'"
 b'org.gnome.desktop.interface' b'cursor-size' b'48'
InstallationDate: Installed on 2019-02-24 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.

Ubuntu 18.04 (bionic) reached end-of-standard-support on May 31, 2023.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it anymore. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in.