Pantheon screenshot glitch

[davidak]

Describe the bug
When i didn't took a screenshot for some time, the first one is glitched. The second is as expected.

Often it has parts of the framebuffer in it like this:

This happens only with the screenshot feature where you select an area (SHIFT+PRINT).

To Reproduce
Steps to reproduce the behavior:

1. use pantheon desktop
2. SHIFT+PRINT
3. see screenshot

Expected behavior
screenshots not glitched

Additional context
This didn't happen some time ago.

Notify maintainers

Metadata

• system: "x86_64-linux"
• host os: Linux 5.11.13, NixOS, 21.05pre283367.0a5f5bab0e0 (Okapi)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.4pre20210326_dd77f71
• channels(root): "home-manager-20.09, nixos-21.05pre283367.0a5f5bab0e0, nixos-hardware, nixos-unstable-21.05pre283367.0a5f5bab0e0"
• nixpkgs: /home/davidak/.cache/nixpkgs-review/pr-95225/nixpkgs

Maintainer information:

# a list of nixpkgs attributes affected by the problem
attribute:
# a list of nixos modules affected by the problem
module: