STEPS TO REPRODUCE 1. Plug in a disk 2. In the Disks & Devices popup, mount it 3. From the Disks & Devices popup, unmount it 4. Unplug it 5. Plug it in again OBSERVED RESULT The Disks & Devices popup opens, but it's empty. EXPECTED RESULT Disks & Devices popup opens but the disk is listed in it. ADDITIONAL INFORMATION After step 5, if I restart plasmashell, the disk is shown in the popup when I open it manually. This is a regression from Plasma 5.
This turns out to be a regression from https://invent.kde.org/plasma/plasma-workspace/-/merge_requests/3416, not something already in master.