Something that seems to have occured after one of the last updates:If you are in Grid View in the library module and have more images in the folder you browse than fit on the screen. Select one image and then scroll through the rest of the photos. Once the selected image is out of sight, find a collapsed stack and click on the number to expand it. When the stack expands LR needs to renumber all the tiles (obviously). The problem is, that the selected images is brought into view again, so you have to start all over again to search the now expanded stack. This happens when the stack is either above or below the selected image and is kind of annoying if you want to select an image and an image within a stack. I don't know if collapsing the stack yields the same behaviour, but I would strongly suspect so.Win 10 64bit, LR 2015.6.1, GPU on (shouldn't matter in library, shouhld it?)Can anyone reproduce?On a sidenote: how entangled is everything programmed, that changes somewhere can have unexpected results at a seemingly unrelated different part? (No offense meant, just curious)