Hi mate,
There will be a better way of doing this but if you are rotating an object around a null you could apply the following expression to the objects y Rotation.
transform.yRotation-thisComp.layer(“Null”).transform.yRotation
Just insert the name of your null where it says “null” in the expression.
You will have to rotate your layers y axis individually so they all face forward properly. Also this will only work if the anchor point is centred to your object.
I’m sure there are much better ways to do this but that’s my fix.
Cheers,
Andy