What is your default time of manual setpoint in the Energy app (settings -> operating mode -> manual setpoint) ?
That could be the case. Your Time??
Yes this is the issue. You ask for heating but only for 5 minutes because the manual set point is 5 minutes. After it come back to away mode. I usually set it to 20 minutes but you can observe your system and set it for your needs.
Thanks. I‘ve changed to 20min and will observe it the next days