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24/192KHZ IS SILENT AFTER LOWER SAMPLE RATE TRACKS IN PLAY QUEUE

Problem occurs using HiFiBerry DAC+ Pro on RPi 4B (2GB) with HiFiBerry OS.

When I play a 24/192khz track to the HiFiBerry DAC+ Pro endpoint, following a track of a lower sample rate in the queue, no sound is heard. There is every indication in Roon that the track is playing (timeline advances and signal path light is purple) but, just silence.
Again, this only happens when a lower sample rate is played first (sounds great) and then a 192khz track follows (just silence).
I can play 192khz files with great sound if it starts the queue or follows another 192khz track.
This happens regardless of storage location (both local files and streaming from Qobuz).
Other 24 bit files are ok, the problem only occurs with 24/192.
FWIW, this problem has been occurring since I first deployed the HiFiBerry DAC a few weeks ago.

Troubleshooting steps taken so far:
1.Rebooted everything, checked HAT connection.
2.Used Resync delay in device setup (even up to max value).
3.Connected endpoint using Ethernet.
4.Ran endpoint using RopieeeXL instead of HiFiBerry OS.

Any thoughts, ideas or suggestions would be helpful and welcome.

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