Hue Motion Sensor drops frequently on Homekit

Hi Folks

I often see my Philips Hue Motion Sensors saying unavailable in Homekit. Many times on restarting of hassio it comes back… or simply comes back after sometime…

But for most of the time it seems unresponsive. I don’t see this with other hue attached devices like switches etc. Hue has been auto configured and I have not done anything special

What can I check in HA to see its responding and then in homekit and find where the problem lies?