Problem with pubkey authentication to ssh into MiSTer

[Saroumane]

Hello, not sure if it's the right place to report this kind of problem, but let's try.

I can't anymore use my rsa pubkey to login into my MiSTer.
Maybe something has changed with the latest linux update for MiSTer.

What used to work :
copy my ~/.ssh/id_rsa.pub (on my PC) to ~/.ssh/authorized_keys (on MiSTer as root)
On MiSTer :

# chmod 600 ~/.ssh/authorized_keys
# chmod 700 ~/.ssh

On PC :
$ ssh root@MyMiSTerIP

Now, when I try this (with 'ssh -v' for more verbosity) :
the connection hangs at:

debug1: Offering public key: ~/.ssh/id_rsa RSA SHA256:rGQ/rMN/uqHUX+2wIH/Ch5ylXOe8Loxwxxxxxxxxxxx agent
debug1: Server accepts key: ~/.ssh/id_rsa RSA SHA256:rGQ/rMN/uqHUX+2wIH/Ch5ylXOe8Loxwxxxxxxxxxx agent 

('xxxxxxxxx' is an edit from me)

Interestingly, if I alter ~/.ssh/authorized_keys to force the pubkey authentication to fail, I don't get the Server accepts key after the Offering public key . Instead it does not hang anymore, and fallbacks to password authentication.

[tjanas]

Would https://github.com/MiSTer-devel/Main_MiSTer be a more appropriate repo for this issue?