Matter tilt only Window Coverings and the Home App

There are a number of window covering types that have tilt only capabilities, such some venetian blinds. The matter specification allows for a window covering to have tilt only functionality and attributes.

When I add one of the tilt only Matter accessories to the Home app, I get "This accessory is not responding"

If I go into Accessory Details and Settings, I am still able to use the tilt slider (see photo), however the target tilt percentage is always sent as 100% (90 degrees) or 0% (0 degrees). There is no granularity.