Clarification on CoroutineScope doc

[KelvinJin]

So I've noticed that the doc says

If the given [context] does not contain a [Job] element, then a default Job() is created.
This way, cancellation or failure of any child coroutine in this scope cancels all the other children,
just like inside [coroutineScope] block.

The key confusion here is that cancellation of any child coroutine in this scope cancels all the other children. From my testing, cancellation of a child of a Job() doesn't really cancels all other children. Maybe I'm missing anything but the testing code is:

val scope = CoroutineScope(Dispatchers.Default)
// Or more explicitly val scope = CoroutineScope(Dispatchers.Default + Job())

val job1 = scope.launch {
    delay(99999)
}
val job2 = scope.launch {
    delay(500)
}

job2.cancel()

println("job1 state: ${job1.isCancelled}") // false
println("job2 state: ${job2.isCancelled}") // true