Chromecast control lost immediately after playback starts on Plex Windows/Web

Server Version:
Latest Plex Media Server version

Player Version:
Latest Plex Web / Plex for Windows version

Hello Plex Team,

I have a persistent Chromecast problem with Plex on Windows.

Problem description:

  • Chromecast is detected correctly by Windows and Plex.
  • The movie starts normally on the Chromecast.
  • Immediately after playback starts, Plex loses control of the Chromecast session.
  • I cannot pause, stop, seek or control playback anymore.
  • The only way to stop playback is disconnecting Chromecast manually.

Important information:

  • Chromecast itself works correctly.
  • Plex mobile app works better.
  • Windows detects the Chromecast devices correctly.
  • The issue mainly happens with Plex Web / Plex for Windows.
  • Other streaming apps sometimes show similar Chromecast control issues too.

What I already tested:

  • Different browsers
  • Plex Web and Plex for Windows
  • Restarting Chromecast and Plex Server
  • Local network discovery enabled
  • Secure connections set to “Preferred”
  • Different network settings
  • Direct local access and app.plex.tv access

The stream itself works, but the Chromecast control session disconnects immediately after playback starts.

Could you please check if this is a known issue with current Plex Windows/Web versions and Chromecast?

Thank you very much.