I’ve put my game on my Android phone (Moto G) to test it, and found that when in any gamemode which I have if I try to move the character the screen goes black except for the GUI. This suggests that the camera is destroyed, but I have nothing in my scripts that would cause this. The weirdest thing is that if I just slightly move the character it is fine, but if you hold it down for too long then this problem occurs!
Still very new to Unity and this is my first time developing for Android. If you need to see my scripts as there is no obvious solution just ask.
I do not think it will be easy to understand your issue. Atleast state your objective for touch code where the app is malfunctioning on device perhaps instead of a single touch it is sensing a multiple touch or a different touch phase where your camera seems to go haywire.
Your touch functionality on being tested on device may have a different effect. It could be due to an unhandled condition or exception for the touch functionality if it is not a coding error. Perhaps you have not defined the touch phases clearly in your code.
That’s what I can gather from your problem until now. Don’t really have much to go on.