Flickering 2D assets when moving Camera in subpixels

Hi,

I've been researching this issue for a while now, and haven't found any solution. When I move the camera in sub-pixels ( smooth follow ) 2D sprites shake in relation to the ground (2d sprite as well).

Is there a way to root 2D sprites on other 2D sprites (for example a tree and the background), so that static assets do not shake when the camera moves ? I've tried to play around with anti-aliasing, which the higher I set it the better it gets, but that is not a viable option due to performance on mobile.

I'm extremely thankful for any hint.