Works perfectly, but the character starts to almost do a vibration motion.
Instead of using the scrollto behaviour create an on every tick event and add:
scroll to X - lerp(scrollx,player.x,0.5)
scroll to Y - lerp(scrolly,player.y,0.5)
This will give you a smooth scrolling camera. You can adjust the 0.5 figure between 0 & 1 to change the camera lag.