Eufy Camera Person Detection / Sensor - Not working, why?

I followed the video Home Assistant Setup with Eufy Doorbell: Notifications & Live Stream to set up my eufy cameras within Home Assistant. All my eufy cameras are shown in “Eufy Security”. @fuatakgun great work!

Problem:
Unfortunately, “Person detected” does not work, why?
I would like to set up some automations as mentioned in the video.

All my cameras are logging every now and then alternately “Wurde nicht verfügbar” = “Was not available” and “Wurde frei (keine Bewertung erkannt)” = “Was released (nothing detected)”

Nevertheless, the iOS App “eufy Security” identifies a Person in front of the camera as event (I tested it several times). It seems that this information is not available within Home Assistant.
Any ideas how to solve this problem?
Do I need to change any of my settings?
Could it be, that having more than one camera, that are too much information to be processed?