Here some contribution from my testing with DS JR and Roon.
I did not got any good sound via bridge to start with via DS JR with Stellar M700 and Roon. The sound via USB was much better. I tried to find here in forums if somebody had a good configuration but with no success. I reorganize that many were complaining about same issue with better sound via USB. So I made some testing and got the at last a good sound with this configuration below. So I decided to add this to forum. Hope it helps somebody with same issues. The important thing seems to bee to not enable Roon MQA core decoder and set the Clock master priority to highest.