Ray cast problem with split screen camera


in this scene I simply changed the cameras viewport from:
X: 0 Y: 0 W: 1 H: 1

to a possible split screen setting (with two or three cameras, like here):
X: 0 Y: 0 W: 1 H: 0.7

But then the ray cast does not work correct anymore (wrong click/touch position).

I tried to figure out how to change the script but found no solution so far.
Any help would be appreciated.

Looks like a bug with the screenToWorld function not taking into account of the viewport of the camera. :worried:

Ok, thank you for the info yaustar.

Is there something (not to complicated) I can do to fix this?
Or does someone know a workaround?

Any fixes or patches to this problem yet?