After long, long trials I found the root cause:
It is very important, to set FIRST the blade postion and then change the hight of the rollershutters.
If you just want to change the hight of Rollershutter without changing the blade positon you have to send first the value 101% to the blades.
Same vice versa: If you want to change the blades without changing the height, you have to set the value 101% for the hight.
Important is to set always the blade value first.
Does anybody have an idea how to realise this with openhab?