That’s a known bug in the sim that’s been reported since launch and is still alive and well. It’s not just the camera view. It’s ALL inputs - yoke, pedals, throttles, etc.
Also keep in mind the sim has no native touch screen support, so by default, things like the GTC on the TBM or Longitude, the G3X and GTN750 won’t work. Touching their screens will just kill your controls as you’ve already discovered.
HOWEVER…
I would strongly recommend using the Popout Manager at the link below. You can setup particular layouts and it will pop out and place the screens for you automatically. Also, if you’re using one of the aforementioned touch-enabled systems, you can configure those screens to have touch input via a touch to mouse click emulator. And after you touch, it will return focus to the sim window so you don’t encounter that problem of your controls cutting out.