DSD with Lampizator GG with Antipodes DX and Roon

I have latest Lampizator GG (R2R Ladder with DSD512 capability), latest Antipodes DX running 2.3 s/w. Roon is v1.3. I have problems playing above DSD128. DSD256 is very spluttery and DSD512 gets downgraded to PCM. Also can’t play DSD in Native mode. DSD files show as DOP when played. I have tried a high end Windows 10 music server using Roon 1.3 and can play up to DSD256, both DOP and Native DSD. I need JRiver to play DSD512 on Windows device. Any advice appreciated.

I understand Lampizator will release firmware in the very near future that includes Linux DSD256 support.