What changed about initialising instance variables?

[vns]

I think this might be relative to other topic:

Swift Concurrency In Real Apps

I hear your feedback, but this particular issue: is a regression in Xcode 16 Beta 5 that's fixed by [6.0][Concurrency] Implement a narrow carve out in the isolation override checking for `NSObject.init()`. by hborla · Pull Request #75749 · swiftlang/swift · GitHub.