I do a lot of automatic and manual contacts in simulations when using Fusion 360. I usually use different types of contacts in different parts to get the most accurate FEA possible. This requires going to the contact manager and individually changing the contacts type. The list the manager generates though is not intuitive. It starts with one which is good, but then goes to 10 through 19, and then back to 2 and then you guessed it to 20. I'm sure this would be a simple line of code to fix somewhere and extremely helpful.