Do you happen to know of guides, that teach how to use that setup securely?

Doch!

Hast du ne Idee, wie man das besser machen kann?

https://archive.is/hb5O1

Jup, same here. But when I change it to the other pocket it’s all fine. Strange stuff. (The right front pocket works so much better than the left front pocket of the pants)

There is M4’s Book edit and I quite enjoy that one.