I'm not sure about that, but the interference is not wifi. Wifi has a distinctive curved appearance on a chart like this; not a sharp spike. (Also, wifi has mechanisms to allow multiple networks to coexist on the same channel.)
This looks more like what I see when I turn on a microwave oven.
I hear you. Just a thought.
I have some cordless phones that use that band and they kill my wi-fi whenever they ring or are used. Looking for any kind of answer that might make sense.