HA Integration will not works with light by KWT 6422 iG-112

[Black-Tomcat]

Hello,
Since the last HA update, I've been having trouble integrating my Miele KWT 6422 iG-112 wine refrigerator.
I just want to turn the light on at sunset and off again a little later.
This was still working in the February version of HA.
In the meantime, I’ve set everything up again from scratch, but it no longer works.
I’m using Miele Integration 2026.2.0, HA versions:
Installation method: Home Assistant OS
Core: 2026.3.1
Supervisor: 2026.03.0
Operating System: 17.1
Frontend: 20260304.0
I receive messages in the activity log about operation and door open/closed.
I don’t receive any messages regarding the lights; although I can activate the “Light” entity, it resets shortly afterward and remains inactive without any messages or functionality.
At the same time, I can easily turn the lights on and off via the Miele app on my phone.
I’m at a loss and hope for some help, thank you.
Regards

Black-Tomcat

Translated with DeepL.com (free version)

[Black-Tomcat]

Hi,
is it the same problem like here:
#730
?
But, why will it works before?
miele-01KKRWJ34CG3AY7VRBYN3AWWB5-Wine conditioning unit-ed8020a98d41cb386676ffd4b27c5dd8 (1).json

Regards
black-tomcat