SmarttThings hub keeps disconnecting

As of roughly 12:22AM PDT Sep 8, my v2 hub keeps going offline (shows the green status LED) for varying times, from 5 minutes to just over half an hour. Already restarted it once to no avail. Network connectivity is not the problem as I had a stable up- and downlink during all that time. I didn’t see any notifications about firmware updates?! Thanks.