When two images are being Compared, or are displayed in Survey mode, a pick or reject flag entered for the selected image gets applied to the second image as well. I originally observed this problem 'way back with LR4, possibly earlier, and have reported it before (long ago). After being fixed, it appears to be reintroduced with a major or minor release. It considerably degrades the process of tagging images to be discarded or worked on, and creates a real risk of desired images being discarded. Yes, all the new features are really cool and I like many of them, but why this simple problem keeps coming back is baffling, especially because it's so easy to test. Please borrow some resources from all the emphasis on mobile and correct this simple problem.