MiFlora fails to update after upgrade to 39

I get lots of these, roughly 1/min…

17-03-02 17:30:22 WARNING (MainThread) [homeassistant.components.sensor] Updating miflora sensor took longer than the scheduled update interval 0:00:30

and my sensor values don’t show up anymore and the badges indicate that the sensors are offline, however bluetoothctl shows them all there… any ideas?