Comment 22 for bug 1769981

Daniel, not sure if they're related, but it seems that when I get back from the "slide" screen (even if not locked) I'm getting a lot of these errors repeated in journalctl:

May 24 14:52:47 kashyyyk gnome-shell[6901]: Object Meta.Background (0x562f8156e590), has been already deallocated - impossible to access to it. This might be caused by the fact that the object has been destroyed from C code using something such as destroy(), dispose(), or remove() vfuncs
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: == Stack trace for context 0x562f7ecee330 ==
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #0 0x7ffe191266b0 b resource:///org/gnome/shell/ui/background.js:718 (0x7f7fbc60f450 @ 22)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #1 0x7ffe19127610 b resource:///org/gnome/shell/ui/tweener.js:113 (0x7f7fc81c7e68 @ 37)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #2 0x7ffe19128580 b resource:///org/gnome/gjs/modules/tweener/tweener.js:208 (0x7f7fc81d3b38 @ 54)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #3 0x7ffe191286d0 b resource:///org/gnome/gjs/modules/tweener/tweener.js:337 (0x7f7fc81d3bc0 @ 1626)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #4 0x7ffe19128780 b resource:///org/gnome/gjs/modules/tweener/tweener.js:350 (0x7f7fc81d3c48 @ 100)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #5 0x7ffe19128810 b resource:///org/gnome/gjs/modules/tweener/tweener.js:365 (0x7f7fc81d3cd0 @ 10)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #6 0x7ffe19128900 b resource:///org/gnome/gjs/modules/signals.js:128 (0x7f7fc81d3230 @ 386)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #7 0x7ffe191289b0 b resource:///org/gnome/shell/ui/tweener.js:245 (0x7f7fc81cf808 @ 159)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #8 0x7ffe19128a10 I resource:///org/gnome/gjs/modules/_legacy.js:82 (0x7f7fc81b5de0 @ 71)
May 24 14:52:47 kashyyyk org.gnome.Shell.desktop[6901]: #9 0x7ffe19128ab0 b resource:///org/gnome/shell/ui/tweener.js:220 (0x7f7fc81cf780 @ 15)