Android intent.getParcelableArrayListExtra on ArrayList<LatLng> raises Nullpointer exception

I'm trying to pass an array list of LatLng objects to another activity. The method is defined in a Util class which is not an activity. But the receiving activity always raises NullpointerException

class Utils {
    companion object {
        fun startMaps(pairs: MutableList<LatLng>){
            var intent = Intent(AAddressActivity.appContext, MapActivity::class.java)
            Log.d("pair", ArrayList(pairs).toString())
            Log.d("pair", ArrayList(pairs)[0].toString())
            intent.putParcelableArrayListExtra("key", ArrayList(pairs))

            AAddressActivity.appContext.startActivity(intent)
        }
}

Log.d prints the content of the pairs which are not empty. /// AAddressActivity.appContext where AAddressActivity is the activity calling the Utils.startMap() method, and appContext is defined as

companion object{
        lateinit  var appContext: Context
    }

and initialized in the onCreate() AAddressActivity as appContext=this to allow external access to the context of AAddressActivity.<br>
This is the receiving activity:

class MapActivity : AppCompatActivity(), OnMapReadyCallback {
    lateinit var latLngList: ArrayList<LatLng>
    @RequiresApi(Build.VERSION_CODES.TIRAMISU)
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_map)


        // Error happens here
        latLngList = intent.getParcelableArrayListExtra("key", LatLng::class.java)!!
        Log.d("longMap", latLngList[0].toString())

    }

Error is

    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.androidapplicationproject/com.example.androidapplicationproject.mapUtil.MapActivity}: 
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Class.isInterface()' on a null object reference

As far as I know, LatLng object implements Parcelable so I shouldn't worry about that. But why is the error happening? How do I fix it.<br>
<br>
I just found that if there are only ONE element in the pairs then the MapActivity can successfully receive the parcel, but if there are two or more elements in the list, the exception raises.

I reproduced the issue and since it didn't seem like there was anything wrong with the code, I googled for "parcelablearraylist bug" and found this Reddit thread that had a comment that linked to this bug report where a Google Engineer acknowledges it's a bug.

So to answer the question:

> But why is the error happening?

It's a bug with the new methods that take a Class argument.

> How do I fix it.

Stick to the old methods that don't take a Class parameter (like getParcelableArrayListExtra) until the bug is fixed or they release a Compat version of the API that will work correctly.