The valves are asleep all of the time, this is normal. They have to be, because the batteries will last two years. They are programmed to wake up every 7.5 minutes to talk with the Genius Hub and then they go straight back to sleep again - it's a tough life being a Genius Radiator valve! If you make a change on the app and them immediately go to the valve it may take up to 10 minutes for the valve to get this change, if you press a button on the valve then they normally get the new temperature immediately as you have just woken the valve up. The reason for a valve's slow reaction time in the first week is that there are 1,000 steps in the electronic valve from the fully closed position to fully open and it needs to learn about how the radiator responds. This makes it extremely accurate and quiet when controlling to a set point temperature in normal operation. See this explanation of the valve learning: Genius Radiator Valve taking a long time to warm up - outflow side of the plumbing.