After changing modes, there is a standard 5-7 minute delay before the Thermostat will call for heating or cooling. This is done to protect the compressor for air conditioners and heat pump systems from excessive wear.
During this time, the setpoint on the Thermostat display will show in black. Once the delay has passed and the Thermostat calls for heating or cooling, the setpoint will show in red for heating or blue for cooling.