Collision Detection with Drone agent

Hey,

I'm trying to perform some collision detection in the Ai2thor environment. I have set the agent type to **drone**, since that's the requirement.

While moving the drone continuously using `MovieAhead`, I can visualize the drone colliding with an object (e.g. wall). But the event.metadata["lastActionSuccess"] always returns True inspite of the drone colliding with an object. I also checked the 'errorMessage` and there's no output.

I tried the same setup with agent as `default` or `robot` and the collision detection works well. event.metadata["lastActionSuccess"] returns True when there's a collision and `errorMessage` prints the appropriate output.

Can you suggest why this happens? Do I need to make specific code changes to enable this for the drone agent?