Thunar notifications are broken - eject button for external SSD drive

[bpr-323]

Thunar has stopped showing "eject" button in left panel for external SSD drives connected across USB.
There are 2 scenarios - 1st time insert USB cable = eject simbol appears. But if reboot with SSD drive connected Eject symbol should appear after clicking on drive icon (i.e. once it's mounted. But it doesn't and have to right-click / unmount from menu.
Normal USB drives work OK.  Tried reinstalling XFCE4 notifications and Dunst - no luck.
Nautilus and Nemo work fine out of the box.