Problem was outdoor module battery was poor (however, was reported at 67% by netatmo). If data is missing from netatmo the netatmo module will stop updating and keep the old temperatures. If MM is restarted a spinning wheel will be shown. Hope that the new batteries did the trick.

Hi
Im having this problem too. Did any of you find a solution? Everything else works fine and updates, but Netatmo module shows old data…