Things listener does not get triggered when Thing is updated by Hub-Things Connection

Question

I've a strange problem.

1. I have created a Thing.

2. My Thing's Policy has BOTH entries for Authorization for my Hub-Things Connection as well as for my Java Client (Things Client ID).

3. I can verify that the Hub-Things Connection DOES update my thing since values change.

Whenever the Hub-Things connection updates my Thing, my Java Things listener is not called/updated. However, whenever my Thing is manually updated via Things REST call (e.g. PUT ​/things​/{thingId}​/features), my Things Listener gets called.

Any clues?

I'm using the Bosch IoT Cloud Instance of IoT Things.