Which windows client? Plex for Windows? Plex Media Player (PMP)?
If you are using the Plex app from the Windows Store, you should change to either Plex/Windows or PMP. The Windows store app is discontinued. It had no development work for about 2 years, so it is badly outdated.
Can you explain further?
What do you mean by “read EAC3 movie”?
Will the movie not play? Will it play but no audio?