I have windows 10.
I've made all the latest updates.
I've read in some other articles , that start menu has a limits of 500 or 512 items.
But with my system I have this problem with 232 or more items.
When I have 231 items I have no problem. When I install another program that adds 2-3 other shortcuts , many of the shortcuts of start menu disappear. I've done a system restore at the point before program installation. Everything back to normal. I try to install another program that add 2 shortcuts. The problem appear again.
Updated I think there's no any rule on this problem. I have another PC with windows 10 , that has this problem with 116 items.