HRT4-ZW and Aeon Labs Smart Switch

I have replaced a faulty ASR today that was paired with a HRT4-zw.
Both devices were included in Vera, then i used “A” on the HRT4-zw to pair the ASR to the HRT directly. It all worked great.

I have now added the Aeon Labs Smart switch in vera, and done the same association with the HRT4. It works for a few minutes, but 30 mins or so later it won’t work directly at all, by setting a new set point in vera or from the dial.
The Aeon works directly from Vera, but nothing else.

I tried setting an association, Group 1, in Vera - set on the HRT4 settings on the Aeon, but this didn’t even work temporarily.
How do i get direct linkage between the two?

I have tried removing both devices from the entire network and re-adding - nothing.

I want the ability for vera to set the thermostat set point, and also the energy and status on the aeon too, hence both in Vera.

Thank you.