We recently updated an old site from EE 2 to EE 5. In EE 2 when you edited a title of an entry it would also update the url title the same way that it does when you create one. Now on EE 5 it will not update the url title if you are editing an entry. It will only do that when you create an entry. I get the reasoning for this as if an entry is published and you change the url of that entry it could cause problems but the admins for this site are requesting that functionality back as that is what they are accustomed to.