Well, it stopped doing that every day. So this is beginning to just look like bad luck. But gee, it hung up that way every day for a week ...
I guess another possibility is that someone was messing with that channel at the same time every day for while. Though when I looked, no one else was on that channel.
Though when I looked, no one else was on that channel.
A significant number of users make use of the option on their wireless routers to "hide" their network, so it is quite possible that there are other networks around you that your scanner cannot "see".
When I was having interference problems a few years ago, my utility would pick up 5-6 networks around me. When I had a professional IT guy come out and run some scans with pro equipment, his program picked up 18 possible sources of interference.
There may be more networks around you than you might think.