Homekit Rollershutter grouped with tilt does not work anymore

Hi,
I have a few Rollershutters within a group with a tilt angle as described in the docs:

This group/item does not get displayed anymore by the home app.

This is my config:
KNX Thing:

Type rollershutter  : Storen_EG_Buero	        "Storen Büro"       [ upDown="2/3/30", stopMove="2/3/31", position="2/3/32+<2/3/36" ]
Type dimmer         : Storen_EG_Buero_tilt      "Lamellen Büro"	[position="2/3/33+<2/3/37"]

Items:

Group         gStoren_EG_Buero      "Storen Büro G"                 (g_EG_Buero, Shutters) {homekit = "WindowCovering"}
Rollershutter Storen_EG_Buero	    "Storen Büro"  		            (gStoren_EG_Buero)	     { channel="knx:device:ipcontrol:generic:Storen_EG_Buero", homekit="WindowCovering"}
Dimmer        Storen_EG_Buero_T     "Lamellenposition"              (gStoren_EG_Buero)   { channel="knx:device:ipcontrol:generic:Storen_EG_Buero_tilt", homekit="WindowCovering.CurrentHorizontalTiltAngle, WindowCovering.TargetHorizontalTiltAngle"}

It use to work like this, but since i have no idea when it stopped displaying these items.
Rollershutters without the grouped tilt item still work.

Any Ideas?

Version:
openHAB 3.4.0

Console Outupt:

18:11:54.208 [WARN ] [l.accessories.HomekitAccessoryFactory] - Accessory of type WindowCovering must have following characteristics [TargetPosition, CurrentPosition, PositionState]. Found only []
18:11:54.209 [WARN ] [omekit.internal.HomekitChangeListener] - Cannot create accessory Item:Storen_EG_Buero_T (Type=DimmerItem, State=100, Label=Lamellen, Category=null, Groups=[gStoren_EG_Buero])  HomeKit type: 'WindowCovering' characteristic: 'Empty'

it looks like you need to make characteristics more explicit. please try following

Group         gStoren_EG_Buero      "Storen Büro G"                 (g_EG_Buero, Shutters) {homekit = "WindowCovering"}
Rollershutter Storen_EG_Buero	    "Storen Büro"  		            (gStoren_EG_Buero)	     { channel="knx:device:ipcontrol:generic:Storen_EG_Buero", homekit="WindowCovering.TargetPosition, WindowCovering.CurrentPosition, WindowCovering.PositionState"}
Dimmer        Storen_EG_Buero_T     "Lamellenposition"              (gStoren_EG_Buero)   { channel="knx:device:ipcontrol:generic:Storen_EG_Buero_tilt", homekit="WindowCovering.CurrentHorizontalTiltAngle, WindowCovering.TargetHorizontalTiltAngle"}

there were some new logic for better group handling in OH3.4. maybe it has some side effects