After crashing one drone, and acquiring another with a bad core board, I was able to combine the 2 to get 1 (mostly) functional drone. The only issue I seem to have left is that the front vision sensors are always detecting an object 3-4 feet in front of the drone, and the only way I can fly is to disable obstacle avoidance completely. If I cover the sensors with my fingers, they stop detecting. Any idea why they might think there is always something there?