ScrollY and collisions

In an attempt to optimize my game, I decided to scroll an entire layer (setting the other layers parallax to 0) which contains sprite that moves in sync. The problem is that while touch still works, every collision with object that are on the other layers doesn't get detected.

I imagine has something to do with the coordinates that are now desynced, is there any way to fix this?

Thanks

Bump please, I'm really lost here.

Maybe have a look at this thread, and this manual entry?

Thanks —

I understood the issue, but I'm stuck at making it work right.

Here is a capx with the exact same logic as my game: dl.dropbox.com/u/1606950/helpme.capx .

What I need is to check if the cloud is colliding with the blue bar and destroy ONLY the one which is colliding, not all of them like now. The problem is that I don't know how to pick that correct instance.

If there is another solution it's more than welcome, I need the scrolly because it increases performance tenfold on mobile.

Thanks to everybody that could help me.

The way I'd work around this is to create a hidden copy of the hitbox on layer 1 and use that for collisions. Like this: parallaxCollisions.capx (r99)

ramones, thanks that seems like a nice solution.