I have just received and set up my WF so this issue may have already been dealt with. I am in the Uk and use BT Infinity Broadband.
Sunday evening my broadband router (BT homehub 6) did a restart. This was initiated by either the router or the network. This happens from time to time and is without warning. When it happens all devices are disconnected and then when the router has completed the reboot all the devices reconnect. This apparently happened to plan last night however the WF hub, whilst reconnecting Wi-fi did not restore its connection to the WF server and required manual intervention to complete this by reconnecting to the router.
This morning I thought I would investigate further and tried to replicate the router reboot by turning it off, waiting 30 seconds and turning it back on.
Again the WF reconnected to Wi-fi but not to the server. On this occasion I rebooted the WF Hub and the server connection was restored.
I now know what to look out for but my concern is that the router and hub can be left for weeks with no one available to carry out the manual intervention.
Is there something I am not doing or is it an opportunity for a firmware improvement?
Any ideas welcome