Pausing can cause unplayability

So a few times now I've paused a video for a couple minutes only to try and unpause it and the Pause/Play icon just kinda flashes between the two and never plays. If I stop the episode and try to resume or even start it over I get an unavailable error and am given the "Retry" "Main Menu" or "Logout" options. The only thing that actually seems to work is to log in to my server, completely exit Plex and restart it then reconnect my PS3.

what file types does it happen on maybe its transcoding and after so long it deletes the file and that causes it to have problems resuming, you could go into settings on the pc running plex and go under server/transcoder and hit advance and raise the transcoders throttle buffer.

All MP4s, pretty much all I have.