SwiftUI SortDescriptor with optional chaining key-path will not archive using Xcode 16 beta 4

I'm running into an error in Xcode 16 beta 4 where the compiler can't type check what appears to be a simple @FetchRequest.

I have the following Core Data types:

Establishment

• name
• website
• etc.
• locations (relationship, to many, optional)

Location

• name
• address
• establishment (relationship, to one, non-optional)

In one of my SwiftUI views I have the following @FetchRequest and SortDescriptors. Unwrap required because 'core data' optional types. It looks based on the swift lang key-path expression docs that this should be allowed. Build and run works, but archiving does not. https://docs.swift.org/swift-book/documentation/the-swift-programming-language/expressions/#Key-Path-Expression

In practice it won't be nil and validation should prevent it too so I could force unwrap the relationship property, but, defensive coding I want to make it safe as I can.

    @FetchRequest(
        sortDescriptors: [
            SortDescriptor(\Location.establishment?.name, order: .forward),
            SortDescriptor(\Location.city, order: .forward),
            SortDescriptor(\Location.state, order: .forward)
        ]
    )
    private var locations: FetchedResults<Location>

This worked fine with Xcode 15.x, but fails to archive in Xcode 16 beta 4.

The compiler is unable to type-check this expression in reasonable time; try breaking up the expression into distinct sub-expressions

When I remove the first sort descriptor it works. When I force unwrap the optional key path property it works.

Does anyone know of a documented change that would make this no longer work?

FB14515958 - SwiftUI: SortDescriptor cannot archive in Xcode 16 beta 4 but works in Xcode 15.4

For clarity, this archives fine, note the force unwrap.

    @FetchRequest(
        sortDescriptors: [
            SortDescriptor(\CraftTaproom.brewery!.name, order: .forward),
            SortDescriptor(\CraftTaproom.city, order: .forward),
            SortDescriptor(\CraftTaproom.state, order: .forward)
        ]
    )
    private var taprooms: FetchedResults<CraftTaproom>