Wallpaper corrupts after hibernate

[Vladimir]

Steps to reproduce:
1. Set wallpapers to lock and desktop screens
2. Have a lock screen
3. Press hibernate (?) button
4. Turn on PC after hibernation

Lock screen and desktop wallpapers are corrupted (see screenshot). They are corrupted in a different way.

If i restart PC then it wallpaper is shown fine, until another hibernation.

The bug is easily reproduced on my machine.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: gdm3 3.32.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.0.0-21.22-generic 5.0.15
Uname: Linux 5.0.0-21-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Mon Jul 29 10:29:06 2019
InstallationDate: Installed on 2019-07-20 (8 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
SourcePackage: gdm3
UpgradeStatus: No upgrade log present (probably fresh install)

[Vladimir (int512)]

wallpaper settings

[Vladimir (int512)]

Corrupted wallpaper after hibernate

[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 1809407, 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.