Homeassistant Homematic BBL (adjustable blinds)


anyone using a Homematic IP BBL actor to control tilt-adjustable blinds?
I am unable to fully open the blinds using homeassistant. Using the CCU interface it just works. However, when using homeassistant, the blind goes fully up, then down again a little bit and in the ccc the blind tilt is then shown as 50%.

Any idea?