Dimmer script Smart Home Junkie doesn't work for me with Niko Enocean Switch

Hello,
I have a Niko Zigbee Dimmer Switch with Enocean technology (doesn’t require batteries). It is linked through Conbee and Phoscon to Home Assistant.

Switching lights on and off through the switches works fine.

To perform dimming, I tried to follow these instructions from Smart Home Junkie: Dim Lights THE RIGHT WAY In Home Assistant - TUTORIAL but it doesn’t work for me as expected. It seems that an endless loop is somehow entered and the only thing I can do is to disable the automation.

For Dim Down, I have this (it is the Yaml version of the HA automation, not something I invented myself !!). Only placed Dim Down here, Dim Up is basically the same.

alias: Koffer Dim Down Button (Lang Indrukken)
description: Helderheid omlaag van spots boven koffer in woonkamer
trigger:
  - device_id: 4cd55959897db94a180fc05327fbd00a
    domain: deconz
    platform: device
    type: remote_button_long_press
    subtype: button_2
    id: Dim Down Btn
  - device_id: 4cd55959897db94a180fc05327fbd00a
    domain: deconz
    platform: device
    type: remote_button_long_release
    subtype: button_2
    id: Dim Down Btn Released
condition:
  - condition: trigger
    id:
      - Dim Down Btn
action:
  - repeat:
      sequence:
        - device_id: 7bfb6841adb514f445977def79ef3bb7
          domain: light
          entity_id: a80f267802e1177270c8d21621e3fa9b
          type: brightness_decrease
        - delay:
            hours: 0
            minutes: 0
            seconds: 0
            milliseconds: 200
      while:
        - condition: trigger
          id:
            - Dim Down Btn
mode: restart

Many thanks for helping me out !