I can explain a little bit more:
At the last minute–Friday of last week–we had to add some IPv6 networking support to Roon to satisfy one of Apple’s requirements and pass their app approval process. It involved some low-level networking changes. One of them had an unexpected consequence that broke HQPlayer streaming under some circumstances.
Since this change happened really late in the development process–after most of the QA work was done–there wasn’t time to begin testing everything again from scratch. Our main HQPlayer test setup is on Windows–which wasn’t affected by this bug, so this didn’t come up in a quick “make sure HQPlayer still works” test, since the problem was platform specific.
Major releases always have a few issues, and we take regressions like this seriously. We’ll figure out what else is broken over the next half day or so, and once fixes for the top few problems are ready, we’ll cut another build.