JellySearch

[Topomov]

Try adding the following location block above your regular Jellyfin location block:

location ~* ^(?!/Genres)(.*) {
    if ($arg_searchTerm) {
        proxy_pass http://jellysearch:5000;
        break;
    }
}

Where http://jellysearch:5000 is your host where JellySearch is running.

Do you know if it's normal that the following request: http://192.168.1.22:5500/Users/SOMEID/It...ypes=Movie

Returns the following? {"Items": [], "TotalRecordCount": 0, "StartIndex": 0}

Yes, all authentication is done by Jellyfin. Since I'm not sending any request when no results are found I just return an empty result no matter if the authentication failed or there are no results so I don't leak any data. You will have to set the Authorization header in order for Jellyfin to respond.

The Jellyfin Nginx part is handled by Synology; I have little control over it
I'll try and see what I can do!