As it often the case, the first thing I would try is to reboot the Roon Core, network equipment and your Roon endpoint.
For the Roon @support guys to help, they will need the background information on your setup … thus you can you edit your post and complete the information requested under each heading.
PS
I’m not familiar with the LIO but I had a quick Google, from what I read … It looks like it’s a USB DAC rather than network connected DAC … if so it can’t be Roon Ready … maybe you are thinking of Roon Testing?