RS 130 Playback stops erratically

My RS 130 is has an ethernet connection with a typical speed 300 Mb/s and is directly connected to the router.
i installed a 2tb hard drive that is less than 1/2 full with FLAC files.
Qobuz is the streaming service.

Increasingly, random songs will just stop playing and it’s happening more often.
The internet service is generally strong but there can be wobbles.

I was under the impression that the streamer had multisong buffers to ensure that internet fluctuations do not adversely impact playback. If network instability is the source of this issue then why do the sudden stops also occur during playback of songs on the internal hard drive?

I’ve rebooted the RS 130 a number of times - have not tried a factory reset.
I’ve rebooted the router.
Neither of which have helped.

I’ve not been able to locate directions for updating the software (But I was also under the impression that the RS 130 self updating.)

Any assistance would be appreciated.
Thanks.