Are the exterior lights on the -900 variant broken?

[MITCH1988]

So I don't know if this is just a bug that happens from time to time but I did a flight in the -900 variant and the the exterior lights did not work when I turned them on. Almost the opposite issue when the interior lights didn't work. Now I flew the -1000 variant a few days ago and nothing was wrong. I just want to know if this was an issue that I just need to restart the sim for or are the exterior lights now broken for the -900 variant. P.S. I am on Xbox. 

Edited 6 hours ago by MITCH1988
Rephrased the question.