Question Gravity different in build compared to editor - no scripts

Hello,
my gravity is different in my build than in the editor. I use no scripts at all. basically just a sphere with a rigid falling down a parcour justt with the standard physics. The ball suddenly seems to have more force?
Any clue?

you can see it here: In the editor the ball falls down into the pipe and not just bounces off.
https://play.unity.com/mg/other/floor-is-lava-328