It was related to gnome shell;I had opened another issue or gnome-shell (#1867735) and the workaround was to enable animation and it seems to have solved the issue
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-software in Ubuntu. https://bugs.launchpad.net/bugs/1867955 Title: My entire DE flashes when trying to install an app and the application doesn't install Status in gnome-software package in Ubuntu: Incomplete Bug description: When I try to install an app both with gnome-software and snap-store my DE flashes and it doesn't install anything. tried both with snap and deb. At at least we deb a got an error message "Permission denied" ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-software 3.35.91-0ubuntu1 ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24 Uname: Linux 5.4.0-18-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu20 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed Mar 18 18:48:22 2020 InstallationDate: Installed on 2019-12-24 (85 days ago) InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805) InstalledPlugins: gnome-software-plugin-flatpak 3.35.91-0ubuntu1 gnome-software-plugin-snap 3.35.91-0ubuntu1 ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-software UpgradeStatus: Upgraded to focal on 2020-03-15 (2 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1867955/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

