Home Screen pages intermittently disappear

About 50 percent of the time, when I open my phone, I can see all 6 of my Home Screen pages with my apps organized the way I want them. The other 50 percent, I can only see the first and last Home Screens then the App Library. I thought this was related to the App Library itself but perhaps is a flaw in the code indexing the home screens. This is really annoying when I’m trying to reach an app that is usually found on the second Home Screen page.