Just moved my iFi Zen DAC to the Mac Mini (core) and yeah, issue is still there. Kind of a bummer but oh well. I have two outputs from the Mac Mini… the iFi Zen DAC goes into the 7.1 analog inputs (just front right and left channels) to basically bypass the Marantz DACs… and one optical into the Marantz which gets me up to 192kHz. So I’ll have to live with switching to the “optical zone” if I want to listen to a gapless album and forego MQA.
Disabling all DSP didn’t help on the Zen either.