You should talk about this with Woo Audio probably?
Roon is Linux and does nothing special when it comes down to drivers. ROCK doesn’t even contain the special patches for DACs that streamer often contain (a deliberate decision). You already know that your DAC is problematic even with such (optimized) streamer products. I don’t think that Roon Support can fix your DAC or will write better working Linux drivers for it (if the driver is even to blame for the issue).