Air conditioner not responding to entity dialog

Just wondering if I have missed an issue or if I need to file one. Firstly this used to work. If I select my air-conditioner via the entity name and try and change the operating mode (ie. turn it on) nothing happens. I am talking about via this image
But if I use the thermostat card it works fine. The dialog above reflects the status of the aircon correctly and I can change the target temperature but if I try and change the “Operation” mode or the “Fan Mode” the dialog closes and nothing happens. Any ideas?

Edit: Nothing in the logs

bump any ideas anyone?