Version and Setup: Traktor Scratch Pro 188.8.131.52 macOS High Sierra 10.13.5 Reproduction Steps: Start Traktor on a MacBook Pro 2016/2017. Play a track. Aim your phone's flashlight at the ambient light sensor (to the right of the webcam), and repeatedly turn it on and off. Observed Results: The entire Traktor UI keeps freezing, including the screens on the Kontrol S8, S5 and D2. The Touch Bar also goes to full brightness. Even after the flashing stops, it still takes 10-15 seconds before the UI renders smoothly again. I don't think it's related to the automatic display brightness, as I have that turned off. But there is no setting to turn off the Touch Bar's automatic brightness. It may be a macOS issue, as I can get the Touch Bar to temporarily freeze in other applications by doing the same. However, Traktor seems to be the only application where the UI itself freezes. So I'm interested if other people have the same issue. I've already had to cover up the ambient light sensor several times while playing out, because of lights positioned behind me. Expected Results: The UI shouldn't freeze.