Same issue, can't rotate camera after November 18 update as they added mouse and keyboard support and made samsung notes unable to do many things due to camera issue. Please fix!
Using s-pen on screen before latest update would move the camera.
Steps to recreate issue:
Use a Galaxy Note Phone.
Take stylus out of phone
Download osrs mobile
Login to osrs mobile on Galaxy note device
See your stylus interact with the world.
But not the camera.
Thank you jagex for taking the time to see this message