Tuya curtain and light - light does not response

Hi,
i used the iot.tuya integration to add my tuya devices.
one of them is a curtain with light
https://www.aliexpress.com/item/1005002697690566.html?spm=a2g0o.order_list.order_list_main.150.7d2e586aWQ4u9U&gatewayAdapt=glo2isr

i can see in the devices both curtain and light

curtain works fine where the light does not response.

also looked in the logs and found the following request:

2023-10-14 14:43:56.107 DEBUG (SyncWorker_4) [homeassistant.components.tuya] Sending commands for device someId: [{'code': <DPCode.SWITCH_BACKLIGHT: 'switch_backlight'>, 'value': True}]
2023-10-14 14:43:56.107 DEBUG (SyncWorker_4) [tuya_iot] Request: method = POST,                 url = https://openapi.tuyaeu.com/v1.0/devices/someId/commands,                params = None,                body = {'commands': [{'code': <DPCode.SWITCH_BACKLIGHT: 'switch_backlight'>, 'value': True}]},                t = 1697283836107
2023-10-14 14:43:56.273 DEBUG (SyncWorker_4) [tuya_iot] Response: {
   "result": true,
   "success": true,
   "t": 1697283836204,
   "tid": "yyyyyyyyyyy"
 }

can someone assist please?

Does someone have an idea please?