I am not sure if it is indeed a bug or i am doing something wrong. So I explain the steps I did.

• Created the SSH key from the CHR which will be connecting to the other Mikrotiks via Local (LAN) / Wireguard (no filters)
• Imported the Private key in the CHR (/user/ssh-keys/private/ import user=$SystemUsername private-key-file=$PrivateKey)
• Imported the Public key in the other Mikrotiks /user/ssh-keys/ import user=$SystemUsername public-key-file=$PublicKey)

Now when I SSH using /system/ssh address=10.20.30.2 user=XXXXXXXX it connects to the other Mikrotik. I have checked the log of the target Mikrotik and there was successfull attempt of the SSH connection.

BUT

When I try SSH-EXEC using :put ([/system ssh-exec address=10.20.30.2 user=CongitiveSystems command=":put ([:len [/ip/hotspot/active/ find]])" as-value]->"output") it reports back as failure: authentication failure. I have checked the log of the target Mikrotik and there was no attempt of the SSH connection even.

Can anyone confirm me if it is a bug or I did any mistake? Thank you