Standard options window miniaturized, impossible to restore to usable dimensions

xsane 0.999/lubuntu 20.04 x64: Under unclear conditions, the Standard options window becomes a tiny tiny window that can't be resized and thus rendered unusable. Closing/purging the app and reinstalling is no joy. No shortcut key to maximize window, context menu item available and even leveraging command line options to force window size as per --help comes to the rescue, but it does show some useful tidbits:

a@xps139350:~$ xsane -R

(xsane:28761): Gdk-CRITICAL **: 15:48:37.418: IA__gdk_drawable_unref: assertion 'GDK_IS_DRAWABLE (drawable)' failed

(xsane:28761): Gdk-CRITICAL **: 15:48:37.418: IA__gdk_drawable_unref: assertion 'GDK_IS_DRAWABLE (drawable)' failed

(xsane:28761): GLib-GIO-CRITICAL **: 15:48:39.313: g_dbus_proxy_new: assertion 'G_IS_DBUS_CONNECTION (connection)' failed

At least two users (myself and the poster of https://unix.stackexchange.com/questions/679321/resize-xsane-tiny-window-in-gnome) are reporting the same.