[APP][Pro] Plugwise App by Plugwise [Adam, Anna, Smile P1] [v3.1.0]

I have the Plugwise system for a while now. Works fine! Now I bought an Anna to replace the default thermostat and cover the ugly whole in the wall ;). The Lisa in that room I can use somewhere else. So I connected the Anna to the Smile and the Smile to the Adam. Adam recognized the new thermostat and I added it to the correct room. I can change the Anna temp via the device and via the app. Now I notice following:

  1. The HTML page from the Smile can’t be reached, while I can still ping it.
  2. The Anna suddently shows red and shows “Smile not found”, also it jumps back to 15 degrees. Without doing anything, it works again after a while. The error is gone, but the 15 degrees stay

Does this sound familiar for someone? Do you have the same setup? How can I solve above?

Thx in advance!