Evohome now integrated in HA but problems

I have a single zone (circular thermostat) system.
The thermostat card offers me on and off icons and a temperature slider.
Clicking on the vertical ellipsos gives me a popup with Operation and Preset. dropdowns.
These dropdowns don’t function - clicking any entry displays the chosen entry for a few seconds and then resets to the value shown on entry to the popup.
I want the card to be able to use the features described in the homeassistant evohome page. In particular I want to a) force the temp tempoarily to a value until a scheduled setting overrides, b) force a temp permanently (until I change it). c) return to schedule now.
Any suggestions on how?