Plex Media Server: Playback Stops after a few Seconds

Hi All -

I have a Synology DS216+II NAS running PMS v. 1.7.5.4035 with a 150/150 internet connection. Here’s the issue:

When playing films via browser in and out of my home video playback stops and returns to the film home screen after about 30 seconds or so. This is a relatively recent issue; prior to this films playback without quitting.

How can I fix this? This is EXTREMELY annoying. Any and all advice would be appreciated.

Thank you,

Sha-Ron