Bad syncronisation to Homekit

[Midifreakz]

Hi, love the concept of Climate Group in Home Assistant. I would like to use this to control 2 AC units as one. But I would like to use the Apple Homekit app as a main control. Everything works fine in HA. But after a while, the state in HA does not get reflected anymore in Homekit. Any idea's what might cause this?

Thanks in advance for looking in to this!