Developing audio-plugins (AU) make you use a lot of DAWs (digital-audio-workstations). There's some issue with Logic Pro X that has been logged for quite a while now.
A few days ago I heard the reason it isn't addressed for more than a year now... The developer in-charge on that feature isn't allowed to access other parts of code needed for fixing the issue.
Apple quality-control in the past years has been totally wracked. What concerns me isn't this issue, but the future of it: - it might won't be fixed at all! (arghghgh) - it might be fixed after very long time (and who know maybe they'll break or regress something else).