icons dissapearing in launchpad and dock

I have had this problem for quite a long time now. It happens randomly, there are times that both launchpad and dock work perfectly, but then sometimes this happens. I have no idea what causes the problem, but it's here, and I have no idea what to do. It started happening like this when I updated to high sierra. Funny thing is, I could download the update many times and it always updates and fixes the problem, but then it icons start dissapearing again. I don't know if updating my OS from app store so many times is even good (or normal?) but even when I have High Sierra 10.13.1 I can download it from the app store and install it. Please help me get rid of this problem, it's very frustrating.