Hi,
I noticed that in SSH Server addon, there is a persistent .ssh in /data.
Il looks like in the container that /data/.ssh folder is mapped to /root/.ssh/.ssh , while in my opinion it should be mapped to /root/.ssh.
This is what I can see in terminal:
~ $ pwd
/root
~ $ ls -all .ssh/
total 12
drwxr-xr-x 2 root root 4096 Feb 1 19:31 .
drwx------ 1 root root 4096 Feb 1 19:31 ..
lrwxrwxrwx 1 root root 10 Feb 1 19:31 .ssh -> /data/.ssh
-rw------- 1 root root 396 Feb 1 19:30 authorized_keys
I took a look at https://github.com/home-assistant/hassio-addons/blob/master/ssh/data/run.sh#L81 but I couldn't spot the issue...
I am not sure this is a bug or it's an intended behaviour... I'd say it's not intended.
Thanks!
I cannot reproduce this on my end, tested on multiple systems.

Fix with 8.2
Most helpful comment
Fix with 8.2