I have a movie that is in the same format as every other movie I have, but when I pause it, it won't resume. It'll play fine from start. It's playing Direct Play. If I change playback to transcode it, it resumes just fine. Server is on a Synology NAS with Intel processor.
Thanks /u/norri-matt, the issue ended up being a bad encode. After playing through the movie, it was only half done.