Knx and Hue not dimming correctly

Hello guys.
In OH 3 I’ve Setup a Knx channel from a touch button, where I have a switch on/off and a dim relative telegram (no absolute dimming value)
In the setup I attached a item to that knx channel, here I selected a Hue ambience light. When trying to dim up/down it only goes ± 10% from where the lamp is set already - also what I see in the hue app - so the dimming doesn’t work pretty good - what have I done wrong here?
I selected the “Dimmer with external feedback” when creating the knx channel…

Maybe the dimming telegram is not sent multiple times by your switch.

Try with
frequency=300
in your channel definition.

See the binding documentation for further details.