Switching between Dropbear and OpenSSH only works once


just tried to switch from the recommended Dropbear to OpenSSH temporarily because of SCP.
This worked fine, but now I can’t switch back to Dropbear.
Dietpi still claims that Dropbear is my installed SSH server so I can’t choose it for installation.
Any combination of de- and reinstallation from the dietpi-panel didn’t help either.
I’m still with the key from OpenSSH.
Anybody else who can confirm this (v139 and v140)?

Thanks & regards