Yes clear, the issue is a bit of a long one, and again I invite
@iFi audio to chime in here.
Back before the ZS had Roon Ready certification Roon users were able to use both the USB and Spdif outputs of the ZS at the same time, although this was never supposed to be a function of the ZS it did work with no issues. Now keep in mind only Roon users were able to do this as Roon treated the USB and Spdif as two different zones within its programming.
As a rule from the very beginning, the ZS had a default output, I cannot remember if it was USB or Spdif that was the default but it surely had this and was quoted as having it in the manual.
Now when the ZS became Roon "ready" with certification this ability to use both at the same time was taken away. And the new functional "clicking device info" came into play for selecting your ZS output, many were not even aware of this, as you recently realized, and it was not widely addressed except for in the ZS thread, and here in post one, or somewhere around it.
So now we have what we have, if I leave my zen stream powered off for 20 minutes or so I have to do the same thing you are, opening the browser window and clicking "save" to use the Spdif out. If I leave it on all the time this doesn't happen, I "think" this is because the change to Roon "ready" made the USB the default in terms of Roon, and of course, I may be wrong. If so the simple fix is something iFi or Roon would have to implement. For us the simple fix is just to bookmark the iFi page for the Roon ready end, and if this occurs simply set the output and hit save. No reason to go all thru the menu in Roon to get to the configure device screen.
Not ideal but is what it is, I know that as audiophiles we love to tinker and switch to find the best sound, all part of the hobby for sure but try to keep in mind that a ton of people might never do the things we do, and
@iFi audio or Roon chasing down every tiny glitch is not going to happen in a day. That is why this thread exists, to point out goofy things and goofy fixes, and share with manufacturers what we have come across.
Example: Everyone complained on the Roon forum "when are we getting Roon certification? When When When...
Then we got it and couldn't use both Zones at the same time, so the complaint became, well you know, lol
Hopefully, this can be addressed, but I also realize that we are a tiny part of a big machine, a squeaky one yes, but tiny...
Cheers!!