rest api
If you take a look at post 1:
When I go that item the value is initially BLANK as on the 2nd screenshot of the binary sensor.
When I now start to open / close the sensor the value keeps getting updated: ON OFF ON …
So status updates are fine when they do happen when I already did load that page in the webbrowser.
When I come back to the same page later its again blank until a new update comes to the sensor while the page is again already loaded. so it looks like the state of that item gets instantly lost after it was updated.
all other values like temp etc are ok and the last state is always shown on the ui.