I don't know why or what I'm doing to cause this, but sometime, the camera control will just stop working. I can still interact with everything in the scene and I can place/remove parts, but the camera will not move.
To fix it, I have to either close and relaunch the app, or I also found that I can simply reload the project. At least, since it's only the camera, I can save before fixing it.
Hmm that’s odd! First instance I’ve had of this… if you’re able to reproduce consistently, could you screen record/write down steps? Are you in interaction mode? What device are you using?