Flickering observed after coming out of Unigine heaven

In weston, launch Unigine-heaven & after coming out of Unigine-heaven app to weston desktop could see continuous screen flickering.

Steps to reproduce issue:

1. Download linux Ungine-heaven file from link: https://benchmark.unigine.com/heaven
2. Run the script it will create unigine-heaven folder with executable file.
3. Launch weston with --xwayland option using drm-backend
4. Launch terminal,go inside unigine-heaven folder & launch it giving command "./heaven"
5. select run from the unigine heaven window
6. It will start running animation window. Let it run for few secs, then press quit button & press ok
7. It will show credits window & then comes back weston desktop screen.

Observed result: After coming back from Unigine-heaven to weston desktop screen flickers continuously & also when move the cursor.

Expected result: After coming back from Unigine-heaven to weston desktop screen, no flickering should be seen.

Looks like issue is due to the side effect of below change: ea4700c8

Issue is not seen when I revert above change.

System details: Ubuntu 22.04 Linux 6.5.0-rc3db-v3-uq-v5 AMD Ryzen 9 5900X

Issue video:issue_video

Non issue video after reverting above mentioned change:non_issue_video