Melco Audiophile NAS

[eagle3333]

Hello All, I'm a Newbie here and struggling with a router isolation issue I hope someone might be able to solve for me. Following occasional dropouts with my Melco N1ZH mkll, Melco suggested isolating my audio control system from the rest of my internet processes. They recommended running 2 routers WAN/LAN with the N1 connected to the second router using a different default gateway to the first in order to effect this. So :

Internet router 1 via ethernet to switch via ethernet to internet port on router 2 via ethernet to Melco via USB to DAC. (Router 1 is a Sky Q hub 1gb; Router 2 is a 300mbps Buffalo).

Problem is I'm getting even more dropouts than before and music collection is very slow to load. The N1 disappears from the Melco app and needs refreshing from within it pretty much whenever the third track of an album finishes, almost guaranteed. Music stops and the N1 disappears from the app. Sometimes it can't find it again with the refresh in the app and I have to re-start the app and N1. On start-up it can take an age for the N1 to appear in the app.

I'm pulling my hair out. Can anyone solve? Many thanks.