Theengs mobile app

Hey - I bought the app for my Android tablet. (Samsung Tab 7 FE)
It has found a Mi Flora sensor and does connect successfully to my Home assistant - but there are two major problems:

  1. It does not update any sensors, EXCEPT when I click on “update sensors”. In settings, the interval is 5 minutes (also had 30 min and 1h). This is since I installed it yesterday. When I open the app, it immediately finds the sensor.
    Any battery optimization is off and the app has full (also background BLE) permission.

  2. HA only parses / recognizes two out of 4 sensors. Just the Lux and °C, not the fertility and not the moisture. When manually updating, i can see in the protocols, that the sensors are submitted to HA.
    See also here for this behavior:
    Mi Flower Care sensor via MQTT (Theengs) has missing sensors

Can you please help - I mean, the app is not super expensive - not at all, but I paid it and really want it to work properly.