Infuse + Plex: “Up Next” shows movies in two languages - how to fix?

Hi everyone,
I’m using Infuse with Plex Media Server and I’ve run into an issue I hope someone can help with.

I have two Plex movie libraries that contain the same content, but with different metadata languages:

  • One has English metadata (used by me),
  • The other has Polish metadata (used by other household members).

When setting up Plex in Infuse, I only selected the English library. Infuse is set to Library Mode, and everything displays correctly in English across the interface - except for the “Up Next” (Watching) section.

In that section, I’m seeing movies listed in both English and Polish, even though I only linked the English library.

My questions:

  • What am I doing wrong?
  • Is there a better way to use two Plex libraries in different metadata languages without them overlapping like this?

Everything (Infuse, Plex, etc.) is updated to the latest version.

Thanks in advance for any advice!

Could that be it?