I believe this is an issue of the combination of Full Disc mode processing and disc structure. I doubt you’d see this behavior with main movie or with clone mode. (I did this flick with customize and had no problems). In my experience, what once was a rare occasion, occurs more frequently now and is at its worst when you try to alter the playback order of various titles with some of the more advanced features of PathPlayer.
You may have some luck with ripping the disc to your hdd first and exiting Fab, then burning it. I’m not sure why this 2-step process seems to work, at least some of the time.
If you’re interested, this was discussed in a recent thread: