Jellyfin AndroidTV 18.0, Images no longer appear

[Series]

With the AndroidTV 18.0 update, images no longer appear across the app—this includes Quick Connect, the library,
and the background.
This issue wasn’t present in version 17.9,which works perfectly. I’m currently using the app on a Fire TV Stick.
Interestingly, this problem didn’t occur in Beta 2, but after switching to Beta 4, the issue started appearing.

[niels]

Have you tried clearing the app cache?
Does this also happen if you connect to our demo server (demo.jellyfin.org/stable)?

Are you connecting to your server over IPv4 or IPv6?
Via DNS or directly by address?
Do you use https (via a reverse proxy perhaps)?

[Series]

Have you tried clearing the app cache? - yes
Does this also happen if you connect to our demo server (demo.jellyfin.org/stable)? - yes - same problem

Are you connecting to your server over IPv4 or IPv6? - ipv4
Via DNS or directly by address? - dns
Do you use https (via a reverse proxy perhaps)? - caddy

tested on 2 FireTV Sticks