Plex Media Server and Plex Home Theater

I have Plex Media Server on a Mac Pro serving video to Plex Home Theater on a Mac Mini. All file formats play just fine except for HEVC h.265 files. I always get the "Please Wait" message for a couple of seconds when starting the file or when trying to skip back or forward. The timecodes are messed up and the progress bar does not accurately reflect the true position of the play head. The file will play fine if I just let it play through but the skipping back and forth creates a problem. I am trying to figure this out and wonder if anyone else has had this issue.