XFCE Desktop: Safe removal fails with non-mounted volume
On the XFCE4 (tried it with Manjaro with XFCE 4.18) a freshly plugged in USB storage device or a freshly inserted DVD appears on the desktop with the respective icons. The context menu (right click) is offering the options to mount it or to safely remove it. Selecting safe removal, which should result in the removal of the icon from the desktop (and a disk being ejected from the drive), fails to have any effect until the volume has been mounted (either by explicitly selecting that option or by opening it).
Please note that in contrast selecting the eject symbol next to the volume in the left pane in Thunar (listed under "devices") does eject/safely remove the medium even when it has not been mounted (opened).