Feb.19 Update
In addition to the slew of other bugs already mentioned, some of the panel options in the layers panel have quit working. Even more irratating, the opacity slider in the layers panel no longer works in real time. Way to go Adobe. In addition, the preview in the select and mask panel is now so slow as to be unuseable. Way to go adobe. I've switched back. Hopefully they can give as a workable update soon. On a Windows 10 machine.