Why does my Character not come down, after run up a Terrain?

Here is a Video: https://youtu.be/uTGbJVcyAXc Sry Video is a bit lagging cause my PC is a bit slow.

The Problem is, that my character don't come down, after moving up a terrain. Both have colliders, the terrain and the char. What i must do or change in script to solve this? With standard character it works fine.