Thermos card : enable temperature control while in heat/cool

Configuration Frontend
1

Hi there !

I have an issue with my new heater. It’s a Zigbee device that can be connected to ZHA without issue.
The only problem is that it goes to “heat/cool” after few seconds in HA and when doing so I can not control it anymore.
I need to put it to off then heat to get back the control (and there is an other issue but related to this device. When hitting the heat button in HA the heater goes to frost mode).
I want to add that the heater is still manageable even if it is in Frost mode and not in “box mode” (so controlled by the box). So for me it clearly seems to be coming from HA.

Like this :

Screenshot_20240120_172151_Home Assistant
Screenshot_20240120_172151_Home Assistant904×2316 99.7 KB

How can I get rid of this heat/cool restriction ? (there is not even a cooling feature, it’s just a heater …)
I should be able to manage the temperature when I want from HA.

I also seen in the developper panel that the heater is working well when it is in SystemMode.Emergency_Heating state

Here it’s working :

Screenshot_20240121_081655_Home Assistant
Screenshot_20240121_081655_Home Assistant1812×2176 240 KB

Here it is NOT working :

Screenshot_20240121_094651_Home Assistant
Screenshot_20240121_094651_Home Assistant1812×2176 248 KB

2

Is there a way to keep this heater in EmergyHeating mode ?

Or even better, a way to be able to change the temperature while in “heat_cool” mode ?
I don’t even understand why it is blocked ?
The SystemMode.Auto is the default box mode on this heater, I should be able to control it from HA.