Hi Adrian,
I know of these problems, which don't happen to everyone and it is settings related, somehow. But think of when a next track won't start playing, the PC is just too late with things. This by itself is because of the playback thread consumes too many resources compared to what's needed for loading the next track. You could try to play with priorities and/or Processor Core Schemes to make it better.
In the end it is for me to solve, but at this moment it is as it is !
But, when you play Unattendedly, for sure this problem is not there !!
Peter