MacBook Pro 2019 playing sound while updating to 10.14.6 On my new MacBook Pro 2019, while updating to 10.14.6, sound started playing before the update was even finished. It was autoplay from a tab I had on Chrome before updating. It continued playing until I unlocked it and closed the tab. 

Is this behavior normal? How can I avoid this? Has anyone encountered something similar?
You’re not crazy. The same exact thing just happened to me updating to 10.15.6. I thought I was going crazy. I was able to stop the Chrome tab playing audio with the pause button on the Touch Bar.
That was the most buck wild thing I’ve ever seen a mac laptop do while updating the OS.