
Mutter recently added an optimization to only allocate visible children [1]. That broke ClutterClones, but it was subsequently fixed [2]. However, that exposed a third problem, this time with FrequentView: visible but transparent icons, that are not allocated by the icon grid, were cloned and animated during the spring animation. Only animate visible icons with opacity greater than 0. [1] https://gitlab.gnome.org/GNOME/mutter/commit/0eab73dc [2] https://gitlab.gnome.org/GNOME/mutter/commit/08a3cbfc https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/696