Throw NullPointerException when use kotlin 1.5.30

The same code,it works fine before . Now throw NullPointerException when use kotlin 1.5.30

open class Father {
private val bundle = mutableMapOf<String, Any>()

fun <V : Any> Class<V>.getMapValue(key: String): V? = when {
    this == java.lang.Integer::class.java || this == Int::class.java -> (bundle[key]?.toString()
        ?.toIntOrNull() ?: 0) as? V
    this == java.lang.String::class.java -> (bundle[key]?.toString() ?: "") as V
    this == java.lang.Boolean::class.java || this == Boolean::class.java -> (bundle[key]?.toString()
        ?.toBooleanStrictOrNull() ?: false) as? V
    else -> bundle[key] as? V
}

fun <V : Any> setValue(key: String, value: V): V? {
    return bundle.put(key, value) as? V
}

protected inline operator fun <reified V : Any> Father.setValue(
    thisRef: Any?,
    property: KProperty<*>,
    value: V?
): V? {
    return value?.let {
        setValue(property.name, it)
    }
}

protected inline operator fun <reified V : Any> Father.getValue(
    thisRef: Any?,
    property: KProperty<*>
): V {
    val v = V::class.java.getMapValue(property.name)
    return v ?: throw NullPointerException("no key ${property.name} found in map")
}


}
class Child : Father() {
var age: Int by this
var sex: Boolean by this
var addr: String by this
override fun toString(): String {
    return "{age:$age,sex:$sex,addr:$addr}"
  }
}

then i decompiler the child class,it shows that KProperty object allways null

Can you please share how to reproduce the NPE, for example your main function?

Just instance a child object and access the feild,example

object Main {
@JvmStatic
fun main(args: Array<String>) {
    val son = Child()
    son.age = 23
   }
}

will throw exception

Exception in thread "main" java.lang.NullPointerException
	at com.example.myapplication.Child.setAge(Main.kt:61)
	at com.example.myapplication.Main.main(Main.kt:9)

Thank you, I have created a bug report https://youtrack.jetbrains.com/issue/KT-48825, please watch it for updates.