I've been struggling with exactly these symptoms with an 861v4/ID40 since Roon 1.7. Don't think I've made it through a full album before the ID40 is lost, so it's pretty dispiriting.

I've tried simplifying my network, have added a smaller 100Mb switch for the exclusive use of Roon and now wrestling with setting up ROCK on a NUC as my Mac is probably too far behind the curve in terms of spec now.

But musical enjoyment has gone out the window.

I feel your frustration!

George