NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols.
STEPS TO REPRODUCE
1. Insert an SD Card with two partitions
2. Open Disks and Devices applet, and click on one of them to mount and open, leaving the other partition unmounted
3. Close Dolphin, then go back to the applet, and hit the "Safely Remove" button, then remove the SD Card from the computer.
Plasmashell crashes and reloads
Nothing, applet closes and PC continues operating normally
Linux/KDE Plasma: Arch Linux x86_64
KDE Plasma Version: 5.23.3
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
The following error is dumped in systemd's logs when plasmashell crashes due to this bug - https://pastebin.com/Vk2GY77m
*** This bug has been marked as a duplicate of bug 427945 ***