Opening a new tab won't activate
I'm on about a year old Retina display iMac, running the latest and updated Photoshop CC. For a couple weeks now (it's happening more and more frequently), after using Photoshop for a while (time, and amount of usage varies), I'll open a file in a new tab, and it won't be active. The display and navigator and layers- everything I can see about the file will be for a file that was already open in a tab, except I can't manipulate it at all. I can work on the original tab, but any other files opened only show the information for that first file, and seems to be frozen. I can switch between file tabs (the tab highlights at any rate), but nothing changes. The only way I have been able to fix this is to shut down Photoshop then reopen it. When I've done that, Photoshop works fine for a while, but out of the blue, I will open a new file or files, and it's the same issue all over again.
Thanks
