Entity created with default timestamp is null

I have the following table:
```kotlin
object MyTable : LongIdTable() {
// ...
val created = timestamp("created").defaultExpression(CurrentTimestamp).databaseGenerated()
val modified = timestamp("modified").defaultExpression(CurrentTimestamp).databaseGenerated()
// ...
}
```

and the following entity:
```kotlin
class MyEntity(id: EntityID) : LongEntity(id) {
companion object : LongEntityClass(MyTable)

// ...
val created by MyTable.created
var modified by MyTable.modified
// ...
}
```

Now, if I create the entity with:
```kotlin
val obj = MyEntity.new {
// All properties are initialized except created and modified
}

// Fails
assertNotNull(obj.created)
```

But in the IDEA debugger, if I click on the property, it shows the Instant object that has been created in the database.
If I run into the assertion after clicking the property, the assertion doesn't fail anymore.
How is that possible?