That might be the root of the issue. This isn’t necessarily about WiFi specifically but about how well devices have had their WiFi stack written. The obvious answer is to hard wire but that isn’t always possible. An option I have found to be effective is to use a wireless access point and use Ethernet over the last metre. That often stabilises troublesome connections. The only hard and fast rule is to hardwire the core where at all possible. But the access point trick does work there.
I’m not familiar with your Naim products, but there are some basic steps to rule out issues.
Do you experience the same problems when you connect the Qb with an ethernet cable instead of wifi?
I prefer dhcp reservations in the router (in this case the Qb gets an fixed ip-address based on its mac-address) or a fixed ip-address (e.g. in the Qb itself) for all my audio (network) equipment. Did you try that?
Can you describe your network in a bit more detail?
What is wired, what’s wireless, where is your router in relation to the other kit - particularly the Qube (1st or 2nd generation?)
Do you use the Qube without Roon? Does this work ok?
Roon can be picky about network configuration, which is why hardwiring is often suggested. It introduces fewer things that might not work. That said, many many people use WiFi - and powerline adapters - with no issues whatsoever.
WiFi extenders (if I’m reading you correctly) add an extra layer of complexity. Is it possible the Qube is switching between different access points?
A couple of things to try - none of which need be permanent…
Hardwiring the Qube to the Devolo. Should work; nothing lost if it doesn’t.
Moving the Qube so it’s nearer the main WiFi router.
Or maybe turning off the extender.
Hardwire to your router.
In the past, we have seen various issues surrounding Powerline adapters, and as such we suggest not to use these kinds in our Networking Best Practices guide and instead recommend Mesh-style networks if a direct Ethernet connection is not possible.
To localize the issue to the Powerline adapter, could you try temporarily connecting your Qube directly to your primary router and verify if that works as expected?