No worries Phil. Main thing is that you’ve found the problem and are listening to music again. We’ve all felt the frustration of something not working right.
Next time it could be Roon; I don’t think it’s possible to publish continually developing software into a software/hardware environment this complex that doesn’t contain bugs. It’s certainly been a revelation to me to see how a change in one area has a completely unintended consequence in another. Most of these get picked up in testing, but testing has to come to an end, particularly when subscribers are waiting for bugfixes. So in those circumstances the most that can be done is to provide responsive support backed up with software engineering smarts. I think Roon gets that right, and that may be an equally important change in this industry as the software itself.
Edit: Brian recently posted a bug hunt as complex as you would want to get. I still maintain it was poltergeists.