isInitialized is always false when overriding a lateinit var

gistfile1.txt

open class ParentClass {
    open lateinit var property: String

    val isInitialized: Boolean
        get() = this::property.isInitialized

    val isLateInit: Boolean
        get() = this::property.isLateinit
}

class ChildClass(
    override var property: String
) : ParentClass()

class AnotherChildClass : ParentClass() {
    override lateinit var property: String
}

fun main(args: Array<String>) {
    val parent = ParentClass()
    val child = ChildClass("Foo")
    val anotherChild = AnotherChildClass()

    println("Parent initialized: ${parent.isInitialized}")
    println("Parent isLateInit: ${parent.isLateInit}")
    println("Child initialized: ${child.isInitialized}")
    println("Child isLateInit: ${child.isLateInit}")
    println("Another Child initialized: ${anotherChild.isInitialized}")
    println("Another Child isLateInit: ${anotherChild.isLateInit}")

    parent.property = "Bar"
    child.property = "Bar"
    anotherChild.property = "Bar"

    println("Parent initialized: ${parent.isInitialized}")
    println("Parent isLateInit: ${parent.isLateInit}")
    println("Child initialized: ${child.isInitialized}")
    println("Child isLateInit: ${child.isLateInit}")
    println("Another Child initialized: ${anotherChild.isInitialized}")
    println("Another Child isLateInit: ${anotherChild.isLateInit}")
}

/*
 Parent initialized: false
 Parent isLateInit: true
 Child initialized: false
 Child isLateInit: true
 Another Child initialized: false
 Another Child isLateInit: true
 
 Parent initialized: true
 Parent isLateInit: true
 Child initialized: false
 Child isLateInit: true
 Another Child initialized: false
 Another Child isLateInit: true
 */