It looks like you are using Sample Rate Conversion in Roon.
Maybe DAC 1000 is incompatible with 384 kHz.
Try to reset Roon DSP to default settings
P.S. But this does not explain why StreamMagiс does not work
P.P.S. I forgot that CXN has its own internal ATF2 upsampling technology.
Here is the topic regarding such issue. And it looks like the CXN issue.
The only solution by now is to use CXN’s analog output directly to your preamplifier input. And to wait for the CXN firmware upgrade.