eong:
Your ONT is connected to your router directly, right? I don't think your switch behind router has something to do with the drop outs.
Correct, the ONT is connected directly to the router. To be clear I don't think the switch behind the router is the cause of the drop outs, but only some performance issues hitting 2G download.
For the drop outs I am going to reach out and get Chorus to come and investigate, I suspect the light levels on my connection may be borderline (due to the twisting and rough install I have here when the ONT was swapped, as I had zero drop outs with the older ONT paired with the same UDM SE router)