Subtitles shown as "None" if i dont refresh metadata

What client platform (Web, FireTV, AppleTV, etc) and Plex app version?

Also, provide movie & subtitle file name & organization (directory structure).

Make sure you’re using Plex’s recommended naming & organization. Plex can get picky about such things.

Example:

/Movies
   /Batman Begins (2005)
      Batman Begins (2005).mp4
      Batman Begins (2005).eng.srt
      poster.jpg

If you rename movie & subtitle file, you’ll need to do the Plex Dance.