ubuntu impish daily - changing screen positions causes wallpaper to be replaced by strong-blue background

Ubuntu impish daily QA-test on
- hp dc7700 (c2d-e6320, 5gb, nvidia quadro nvs 290)

Changing screen positions (Settings.Displays) causes the background wallpaper to be replaced by a strong-blue color.

Opening windows from there causes it sometimes to turn black.

Using the Settings.Background allows me to restore a wallpaper on the display

** Expected results

On changing screen positions (relative to each other); wallpaper remains active

** Actual results

On changing screen positions (relative to each other); wallpaper disappears leaving a strong-blue background. This background will soon be replaced by black (on activity but not every function causes it)

(possible duplicate - marked duplicate of 1930945)

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: gnome-shell 40.2-1ubuntu1
ProcVersionSignature: Ubuntu 5.11.0-20.21+21.10.1-generic 5.11.21
Uname: Linux 5.11.0-20-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu67
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.463
CurrentDesktop: ubuntu:GNOME
Date: Thu Jul 22 04:19:12 2021
DisplayManager: gdm3
LiveMediaBuild: Ubuntu 21.10 "Impish Indri" - Alpha amd64 (20210721)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
RelatedPackageVersions: mutter-common 40.2.1-1ubuntu1
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)