Part of the model disappears, how to fix it?

Question

Blender

I decided to learn how to make models in a blender, but I encountered a difficulty that I cannot solve.
The bottom line is that I did "Donut" using examples from video tutorials, as a result I had a problem with donut icing, when adding sprinkles to the render, the icing disappears, but everything is displayed in the editor, help!
PS if you sprinkle on the donut itself, it does not disappear.