'withObservationTracking' firing onChange even if value doesn't change

Using Swift
,
1

I did a small experiment with the following code:

@Observable
class State {
    var value = 0
    var isSomething = false
}

and

var state = State()

func printOnChange() {
    withObservationTracking {
        print("Value is now: \(state.isSomething)")
    } onChange: {
        printOnChange()
    }
}

printOnChange()

state.isSomething = true
state.isSomething = true
state.isSomething = false
state.isSomething = false

And the output I'm getting is

Value is now: false
Value is now: false
Value is now: true
Value is now: true
Value is now: false

I thought that the on onChange was supposed to be fired only twice.
Am I getting this wrong?

I'm using the windows toolchain, by the way.