Because you wrote in another topic that you also use Aeotec Door and Window Sensor, I guess that one of these sensors is responsible for your Flow not working the way you want it to.
Copied a post regarding Zone Activity here as info:
Acc. the Using Zone Activity support article, Zone Activation can be used with motion and door/contact sensors only:
The Homey SDK documentation also states that only devices with the
alarm_motionandalarm_contactcapabilities can be used for the Zone Activity option:
(Source)
