Hi! ever since the hub got the latest firmware update on the 15th it has started to go inactive each night and not recovering. My internet works fine and I can connect to other devices connected to the same router. I have to reboot the hub and it starts up again.
Anyone heard about this issue since the update / prior to the update?
In the events I can see that the hub does a hubinfo event each hour and the last event is the hubStatus inactive event.
Happened to me too, 3 nights in a row. I have noticed that around 10pm. Last for about 3 to 4 hours, then everything goes back to normal. In my case only zigbee devices are inactive
Ok. my hub does no recover. I did a hard reset today to see if this fix the issues.
Adding the hub took 3 attempts 
seems that if I try to install it using ethernet it does not manage to download and apply the latest firmware. I tried one last time using wifi instead and that worked.
This smartthing hub does not seem to be very reliable. Should have known that before investing in a DIY alarm system