If a Drone Flies in a Closed Box…Does the Box Weigh Less?

Will the box weigh less ive zeroed it out right now? So if i lift it up, it weighs 21 grams, less set it back down back to zero. Okay lets see what the scale says when i take off okay, so that just stayed right at zero, no matter what i did bump the size do whatever i want. No matter how high or low it was flying, it stayed right at zero. You dont even need a box. You can just fly it over a big acrylic sheet on the scale Music, so whats crazy is, if i catch it in the air and turn it off. The weight returns.