Hue Smart Button link to Lamp not working

Describe the bug

Cannot link Hue Smart Button to Lamp in Phoscon Web App

Steps to reproduce the behavior

  1. I connect a Hue Smart Button to Phoscon. It is shown as it should in the Web Interface.
  2. Then i select a Group to link the Button to.
  3. I go into the Button-Editor, select the button, select the Action On/off and after klicking on “Next” nothing happens.

Expected behavior

i Expeted the Button to be linked an switch the lamp on/off - but nothing happens.

when i klick on the Lamp-Icon of the group i can switch the lamp on/off as it should.

Other Switches like tradfri shortcut button work as expected with the same lamp.

Environment

  • Host system: (Raspberry Pi
  • Running method: (Raspbian
  • Firmware version: 26780700
  • deCONZ version 2.29.1
  • Device: ConBee II
  • Do you use an USB extension cable: (yes)

Hue Smart Button 2.47.8_h2F968624