I have one folder in my app drawer that has more than 1 page (more than 12 icons) in it. After every reboot, and also every now and then, the icons from the second page go out of the folder, into random positions on the last page of my app drawer. Trying to drag them back into the folder results in a blank screen. The way to get them back is simply "sort by custom order" then "sort alphabetically", and they all go back inside the folder they belong. After a while, it happens all over again.