I don't know, I've posted this back in Feb 2018 for the first time and had experienced it long before that post:
http://duc.avid.com/showthread.php?t=397516
I've seen lots of OS updates, none of which fixed the issue.
And with my current system at home I'm using the same OS (10.14.6) as on my iMac Pro at the studio. The iMac Pro does have the issue, my Hackintosh doesn't.