Similar problem just happened, except this time it just froze. My wifi disconnected.  I could still find both my 2.4 and 5 Ghz connections, but received an error when I tried to connect to them.  I had the almond+ screen blanked, and it was nonresponsive.  I gave it several minutes to recover and ended up having to unplug the router to restart it.  I don't know if this is related to my earlier issue or not.