I am having a similar issue. One thing with your sample code there. If you create the model, insert it into the context, then add the relationships, the relationship will stay. so let newEmployee = Employee() modelContext.insert(newEmployee) newEmloyee.company = companies.first try! modelContext.save() But even with this change the view is not updating

Also happening to me

Oops. I was actually on Xcode 15 Beta 4. Getting on the latest beta fixed it

This was working on Xcode 15 Beta 4