NPE when create object with realm and kotlin

I try to use realm work with kotlin but it crash when I create object with the below NPE.

java.lang.NullPointerException: Attempt to invoke virtual method ‘void io.realm.ProxyState.setConstructionFinished()’ on a null object reference

Code Sample

Chat.kt

open class Chat(@PrimaryKey open var chatId: Long = -1) : RealmObject()

Fragment.kt

    override fun onViewCreated(view: View?, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)

        notification_recycler_view.layoutManager = LinearLayoutManager(appCtx)
        val realm = Realm.getDefaultInstance()
        val data = realm.where(Chat::class.java).findAll()
        notification_recycler_view.adapter = NotificationAdapter(data!!)

        realm.beginTransaction()
        val chat = realm.createObject(Chat::class.java, 1)
        realm.commitTransaction()
    }

Version of Realm and tooling

Realm version(s): ?

io.realm:realm-gradle-plugin:3.1.3

io.realm:android-adapters:2.0.0

Realm sync feature enabled: yes/no

no

Android Studio version: ?

2.3.1

Which Android version and device: ?

Android 6.0

[akent]

I have also started seeing this issue on my project. If I make any code change in a RealmObject derived class, it triggers it. A clean build does fix it. I’ll try to repro with the demo project linked above.

[akent]

For the record the other issue tracking this is #4372