App folders on homescreen being removed automatically when a new app is installed

I have HTC Desire 820 running on Android 5.0.1 Lollipop. I have folders with favorite apps on the home screen. But whenever a new app is installed, all those folders disappeared, and the home screen was being set to default. I cannot rectify this issue and even cannot find out why this is happening. What is the possible cause and how to fix it?