Plex connecting to linux client but low quality with windows client

Server version: 1.41.8.9834
Player Windows version: 1.109.0.329-ea562b95

Hello,

Plex installation:
Plex is currently installed in a Kubernetes cluster behind a reverse proxy (Nginx Ingress).
The SSL certificate is not managed by Plex; it is from Let’s Encrypt and is therefore considered trusted (unlike a self-signed certificate).

I have an internal DNS that redirects my Plex address (plex.myaddress) to the PMS installed in the cluster. Therefore, if I type “https://plex.myaddress” into my browser, it redirects to the PMS on port 32400.

No ports are open on my router.

Problem and solution tried:
I am having trouble accessing Plex with the Windows client: all the medias are in low quality because plex client is “Indirect”.
Surprisingly, it works with the Linux Plex desktop client.
It also works correctly in a browser (Windows/Linux) when I type the Plex address.

Both Linux and Windows are on the same machine with the same IP address.
I also tried with another Windows PC on the same network, but it did not work.

The following attempts to fix the issue were unsuccessful:

  • Resetting the DNS cache with the command “ipconfig /flushdns”
  • Reinstalled the Plex client
  • Reinstalled PMS
  • I tried lots of different configurations in the “Network” tab.

Plex configuration:
Default configuration with current changes:

  • Remote access on
  • Network → LAN → "192.X.X.X/24,192.X.X.X/24,192.X.X.X0/24,192.X.X.X/24
  • Network → IP without auth → ‘192.X.X.X/24, 192.X.X.X/24, 192.X.X.X/24, 192.X.X.X/24’
  • Network → Custom URL → ‘https://plex.myaddress:443,https://plex.myaddress:80

Thanks in advance,

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