The only leak fix in 3.36.7 is https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1449 but that one may never be noticeable so may not be the issue you describe.
If you experience leaks then remove any extensions you have installed. If the problem keeps happening after that then open a new bug by running:
ubuntu-bug gnome-shell
The only leak fix in 3.36.7 is https:/ /gitlab. gnome.org/ GNOME/mutter/ -/merge_ requests/ 1449 but that one may never be noticeable so may not be the issue you describe.
If you experience leaks then remove any extensions you have installed. If the problem keeps happening after that then open a new bug by running:
ubuntu-bug gnome-shell