Unable to decrypt, returning raw bytes: b'' - while mirobo discovery

[100111001]

I'm trying to find the token at my Roborock S5 with the command:
mirobo --debug discover --handshake true

Unfortunately, I receive a message that the token couldn't be decrypted. A fresh hard reset at the roborock hasn't helped. Any ideas?

That's the error output:

INFO:miio.vacuum_cli:Debug mode active
INFO:miio.miioprotocol:Sending discovery to with timeout of 5s..
DEBUG:miio.protocol:Unable to decrypt, returning raw bytes: b''
DEBUG:miio.miioprotocol:Got a response: Container:
INFO:miio.miioprotocol: IP 192.168.8.1 (ID: 05c172db) - token: b'aaaaaaaaaaaaaaaaaaaaaa'
INFO:miio.miioprotocol:Discovery done

[100111001]

A second hard reset helped to resolve that issue.