I have another htpc running libreElec so I tried that one too. It is also displaying the same behavior.
Went back to original htpc. It has two hard drive so I can boot either libre or windows very easily. Under Kodi windows no problems so I'm starting to think it's some sort of driver issue with Libre??
As I look into this more it seems to only get hung up on 88.2 files. I have some 96 flax that are fine. What's interesting is that the 88.2 flax files playback via Kodi17 windows are being reported as 88 by the AVR, but with Libre being reported as 88.2