2016 MX AP2.0. I did a quick test on the OPs scenario. The door and trunk buttons grey out as soon as the car is in motion. I tried to see how slow I could go with the buttons active. It wasn't possible. Always greyed out immediately when the car moved even slightly. So, the answer is clear that you cannot initiate a door or trunk open command when the car is in motion. Then I attempted alternative possible scenarios. Two possible scenarios are: One, the trunk was already open when motion was initiated. This is possible, but, you get very audible and visual warnings on the main display and instrument display. Personally, I consider them adequate if not above industry average. Two, I placed the vehicle in Drive, foot on brake and not in motion. I initiated the open trunk via the main console, then immediately started moving. This again was possible and probably the scenario encountered. But, again, I got the audible and visual warnings. In conclusion, it is not possible to initiate a open trunk command while the vehicle is in motion. Could a bad sensor or hardware issue cause a false indication. Sure. But, this could easily be validated by getting the logs.