Need Help: HowTo start to programm a first app: "Pause" (break or "face down") for Xperia 10 III

New try with 4.4.0.72:

  1. installation of situations (+add function: “display”)
  2. installation situations-sonar-0.0.9-9.aarch64.rpm (from github)
  3. configuration of Situation “display down” as desired, see picture:

Aim:
a) Save battery:
While the phone is worn in the trousers or laid down on the display → WiFi should be disabled.
b) Get notifications only when I actively check the phone.

Observations:

  1. First morning, the WiFi was disabled correctly, as seen on the router or by the messages of Situations.
  2. Problem: Some hours later, Situations disabled WiFi, although the display was “on”, when I came near to the proximity sensor (e.g. when tapping on a top corner in an app).

To solve this, I restarted the phone once. Now I got the same (white failure screen as mentioned on 5th of july)

If Situations works like configured, it would spare a certain amount of battery.
Can someone confirm this behaviour? How could I get Situations to work properly?