I don’t know if this bug is Apple related, but it sure is a nasty one.
Let’s suppose you’re recording something on Ableton Live via your line-in. You want to check the sound via your headphones and plug the headphone jack into the line-out of your computer.
What does Ableton Live do?
It cuts a short part off from your recording. It stops recording for a short moment when the jack is plugged in. And again when you pull it off. Basically you’ll have gaps on your recording each time you want to double-check its recording quality via headphones. Crazy, isn’t it.