PMS on DS214Play - Plex client on PS4

Hi guys,

following my configuration:

 

I've PMS (version: 0.9.11.17) on port 32400 on a DS214Play Synology NAS (connected to a Dlink DSL3580L via ethernet).

 

Port is opened and right forwarded to the NAS (I can access also from the outside).

 

When I'm at home usually I use the plex client on the PS4.

 

Now my issue:

 

Why I can stream movie 1080p smoothly and when I try to see something with subtitles, the client start buffering every second???

 

I know that I can burn the subtitles on the video to avoid the problem..but I won't to avoid, but I would resolve it...

 

Is pretty amazing that the Nas automatically download my series and plex automatically recover the subtitles..

 

Maybe is something that can be amend with a proper server configuration?

 

Any help appreciated.

 

Thanks!!

sorry for asking you something complete different, but how did u installed version 0.9.11.17 on your NAS?