I guess they are up to stable 1.28.1.6104 for DSM 7 on the plex.tv download page.
Any luck with that?
I usually ask to reduce the variables, did you plex dance the album that’s acting up?
Would you consider uploading 10sec samples of three of the tracks that exhibit this problem in one album? How about Plexamp logs? If you tag your original post with Plexamp, you’re more likely to loop in elan who often wants to help.