Every time when unlocking a locked screen, gnome-shell crashes and spits the
following journal log entries:

SSep 17 16:50:16 gnome-shell[8734]: Allocating size to ShellEmbeddedWindow
0x5628e771a970 without calling gtk_widget_get_preferred_width/height(). How
does the code know the size to allocate?
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: gtk_widget_get_window: assertion
'GTK_IS_WIDGET (widget)' failed
Sep 17 16:50:16 gnome-shell[8734]: Allocating size to ShellEmbeddedWindow
0x5628e771ac30 without calling gtk_widget_get_preferred_width/height(). How
does the code know the size to allocate?
Sep 17 16:50:20 kernel: gnome-shell[8734]: segfault at 600287 ip
00007f2eb28d07f6 sp 00007ffd1db9dd50 error 4 in
libgobject-2.0.so.0.5400.0[7f2eb289a000+53000]
Sep 17 16:50:20 systemd[1]: Started Process Core Dump (PID 9154/UID 0).
Sep 17 16:50:20 systemd-coredump[9155]: Resource limits disable core dumping
for process 8734 (gnome-shell).
Sep 17 16:50:20 systemd-coredump[9155]: Process 8734 (gnome-shell) of user 1000
dumped core.
Sep 17 16:50:20 polkitd[868]: Unregistered Authentication Agent for
unix-session:1 (system bus name :1.276, object path
/org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_GB.UTF-8)
(disconnected from bus
Sep 17 16:50:20 gnome-session-binary[1661]: WARNING: Application
'org.gnome.Shell.desktop' killed by signal 11
Sep 17 16:50:20 gnome-session[1661]: gnome-session-binary[1661]: WARNING:
Application 'org.gnome.Shell.desktop' killed by signal 11