Thanks everyone for your comments/suggestions. I was finally able to get autorotate working again in the Gallery app using a different technique. I deleted the existing Gallery Home screen shortcut icon (which was working fine up until 14.1.02.0) and then created a new Gallery shortcut by...
I was able to uninstall Galary updates which took me back to 14.0.00.37 and auto rotate works with that version. When I reinstalled the Feb 8 version of 14.1.02.00, the updated app still wouldn't auto rotate.
Unfortunately, a force stop, data clear, and restart didn't work for me. This version of Gallery autorotates fine for me in Secure Folder. I saw a comment from someone in the Play Store that also experienced this issue.
After I updated Gallery to the new version 14.1.02.0, an image won't rotate when I physically rotate the phone from portrait to landscape. The Phone Settings has Auto rotate selected. A workaround is to click the pencil Edit icon on the image then go back to the image.
I got this too. The Note 4 Reddit forum said, "It's peel remote! One of the last updates brought on this 'feature'."
In Peel's settings on your phone, go to the Notifications section and uncheck the "Battery Saver Alerts" box.