Cake frosting and decorating process- should you do while frozen?

Hi there, so I’ve seen a lot of people say they crumb coat and frost their cakes mostly frozen. I think some take it out for 20-30 min first. I’m wondering if this is a good idea as I’ve heard it can cause condensation.

If not, what’s the best process when you don’t want to bake, crumb coat and frost all in the same day?

Thank you!!!!