I discovered a reproducible bug in Nemo:
When I remove an external drive, eg. my backup SSD, by unmounting it, then close Nemo and then click on the little x in the top right corner of the notification window (telling me that I can now remove my drive) to shut that window - that last click starts Nemo again.
Notification window gone, Nemo back up.
Anyone else noticed that?
What can we do?
(Running Solus Budgie on a ThinkPad X395.)