It went from in the 30s to 54 and that made a big difference. Canon would like 70+. There is also a measurement of signal quality, perhaps that's the issue? Finally, make sure the computer and printer are using the same router. I believe that can cau...
I had the same problem and after working with Canon tech support I found out that my connection from the printer to the router was providing a weak signal. After changing the connection to a router extender closer to the printer, problem resolved.