New devices connecting via webui are shown the setup wizard instead of login page.

[lxl]

I have a working Jellyfin server configured. It works as expected when using native applications and after login on the webui. However when I connect to Jellyfin on a new device (in the web client) it takes me to the server setup wizard instead of the login page and if I proceed with the wizard it has the my account credentials pre-filled. This is of course unsafe and undesired but what is causing the wizard to show instead of the login page?

Server version 10.9.2 via docker (linuxserver).