Your problem seems to be related to issues described here: Linn Akurate / Music stops / Roon Remote not updated
As far as I understood Roon Support was not able to reproduce this problem but the problem appears for some of the Linn users.
I had two major changes in my setup since I’ve last seen this issue.
I upgraded my Akurate DS/1 to /DS3 and I replaced my router with a router which is able to assign static ip addresses via DHCP. No idea if one of those changes made the problem disappear.