In Lumin app, please turn off Spotify Connect and Lumin Streaming (AirPlay) if you don’t use these.
Since you’re using Roon, and if you generally prefer DSD sound signature, you can use Roon to upsample to DSD64, and leave Lumin internal upsampling turned off.
In Roon DSP Engine, turn on Parallelize Sigma Delta modulator. There are several Roon settings for DSD upsampling you can experiment with. If you find what you like, please share your findings.