Homekit adjustable Blinds doesn't stay closed

i’m using Openhab 3.0.2 with KNX Binding. Openhab App works fine, but if i want to completlyclose my Blinds with Homekit App, the Blinds closed at first, but after 4-5 seconds they open again. Anybody an idea?

Please see my log:

2021-08-18 12:24:08.235 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'Shutter_EG_EZ_Fenster' changed from 91 to 100
2021-08-18 12:24:09.462 [INFO ] [openhab.event.ItemStateChangedEvent ] - Item 'Shutter_EG_EZ_Fenster' changed from 100 to 98

Here my item:

Rollershutter Shutter_EG_EZ_Fix "Fixverglasung" <rollershutter>   { homekit="WindowCovering", channel="knx:device:bridge:generic:Shutter_EG_EZ_Fix" }

Kind Regards