Clone via ssh fails with "kex_exchange_identification: Connection closed by remote host"

[jki21]

I've modified gitea-persistent-template.yaml to create gitea with SSH port opened:

    # Add 2022 port under Service -> spec -> ports
    - name: 2022-tcp
      port: 2022
      protocol: TCP
      targetPort: 2022

    # Add 2022 port under DeploymentConfig -> template -> spec -> ports
          - containerPort: 2022
            protocol: TCP
            name: ssh

HTTP cloning works fine but follow error shows when try to clone with SSH:

$ git clone ssh://gitea@myhostname:2022/user1/test-repo.git
Cloning into 'test-repo' ...
kex_exchange_identification: Connection closed by remote host

Logs when troubleshoot with ssh -vvvT gitea@myhostname -p 2022:

debug1: Connecting to myhostname [::1] port 2022.
debug1: Connection established.
...
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /home/user1/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/user1/.ssh/id_dsa
debug3: no such identity: /home/user1/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/user1/.ssh/id_ecdsa
debug3: no such identity: /home/user1/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/user1/.ssh/id_ed25519
debug3: no such identity: /home/user1/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).

According to this post, it seems to relate to folder permission issues. Which I checked to be true in the gitea pod:

sh-4.4$ ls -al /home
total 0
drwxr-xr-x. 1 root root 19 May 11 14:03 .
drwxr-xr-x. 1 root root 40 May 27 08:32 ..
drwxrwx---. 1 1000 root 47 May 27 08:32 gitea
sh-4.4$ id
uid=1001(gitea) gid=0(root) groups=0(root)
sh-4.4$ 

It seems that gitea has uid of 1001 but /home/gitea is owned by 1000. Is this a bug or am I missing something?