I've been working with Shawn at iFi about the documented issue here that I and a few others are having which is when using Tidal Connect over USB, whether using AIO or Tidal mode, with a Schiit Bifrost 2 (with Unison USB) I get a loud, prolonged buzz sound when I pause the music. I have tried various USB cables and an iFi Purifier USB and still get the buzz.
Second issue is on some select Tidal Masters tracks (the entire Freya Ridings masters album on Tidal) I get static-like pops throughout the album over coax connection but NOT over USB. I have tried multiple coax cables and the problem persists.
Other than those issues that iFi is looking into, the Zen Stream is fantastic! It's works well and the sound is exceptionally good! Very noticeable upgrade in sound across the board from my Macbook Pro that I was using for streaming before. I love it!