I'd say that, if a product is continually causing you stress, just to give it up and return it.
Otherwise, eliminate everything you possibly can in your set-up until it's just the computer, ethernet hub/router and Zen Stream and see if it works. If so, then add back components until the problem shows up again. I'd even see if a similar set-up with a Raspberry Pi and VolumeIO has the same issues.
If the Zen Stream is crashing, it will have internal logs that should reveal the cause.
--
On another note altogether, I tried my (DIY) linear PSU, and there's definitely a sound quality improvement over the iPower. That was quite a surprise.
Otherwise, eliminate everything you possibly can in your set-up until it's just the computer, ethernet hub/router and Zen Stream and see if it works. If so, then add back components until the problem shows up again. I'd even see if a similar set-up with a Raspberry Pi and VolumeIO has the same issues.
If the Zen Stream is crashing, it will have internal logs that should reveal the cause.
--
On another note altogether, I tried my (DIY) linear PSU, and there's definitely a sound quality improvement over the iPower. That was quite a surprise.