Good deal. You may want to consider posting some Plexamp logs here of the original scenario in case someone wanders by who can make use of them, if it’s at all important to you. (I’d test it myself, but I’m a mostly 320 Kbps scrub with some 44/16. I suspect I’d need some higher bitrate stuff to reproduce as I’ve never seen this in my environment.)
At any rate, glad you got it working to your satisfaction.