I have the same issue.

On 2021-08-26 11:40 a.m., sbob wrote:
> All;
>
>
> I am seeing an odd behavior.
>
> I am running Fedora 34 KDE spin
>
>
> I plug in an external USB drive and the KDE disks & devices app on the
> task bar shows the device and allows me to click "Mount and Open"
>
> However if I click the "safely remove" in the KDE "disks & devices"
> dialog, and unplug the drive, then later plug the same drive in again
> (same or different USB port) then the "disks & devices" dialog never
> comes up, and if I go to it it says "No Devices Available"