Issues binding groups to button

[geelenbert]

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I'm having troubles with binding a group to a switch.

My hardware is the SonOff ZBMini device.

Loading the provided example works as expected:

When using the Switch input (P08/Input2) the relay latches. Using Z2MQTT i can bind a group to endpint 2 on/off. When the relay is switched onor off, the light group is also turned on and off.

What i want to achieve is: Directly bind groups to a button and use the toggle command to toggle the binded group, without the local relay. The relay should be controlled externaly trough zigbee.

Using this configuration, i'm unable to bind a group to "input 3".

is there something wrong with my configuration, of should this work as discribed ?