Hi @Karsten_Thiem,
If you have any interest in joining our beta testing program, we’re currently testing IPv6 compatibility over here: Testing IPv6 support in Roon (for users locked out of ARC due to ISP reliance on IPv6 or CGNAT).
You can join the Early Access group by downloading the Early Access versions of Roon here: https://help.roonlabs.com/portal/en/kb/articles/roon-early-access-program
Please let me know if you’re interested, as we’ve been making progress for automatic configuration on networks with dual-stack lite in place.