I would keep your Innuos Zenith mk.3 and just use Roon for now instead of the Sense app. Give Innuos more time to work out the bugs with their new app.
I have the Innuos Zenith mk.3 and have no issue with the Sense app. The Zenith is a great streamer and the sound quality is better with using the Sense app compared to Roon.