Oh boy... WiFi connections and their connect problems are so complex, that it's impossible to list one problem and/or one solution as the panacea for all of them.
Determining a WiFi connection problem can be different among users. Meaning... if the user experiences a loss of Internet connectivity, that can be the result of an IP configuration issue, and the basic WiFi connection path still be good to the router or access point. Not being able to access the Internet might be just the loss of the IP config entries for Gateway and DNS sources, but other WiFi functions and connections could still be in tact.
Possible interference from outside sources HAS to be considered also. When the signal path between two WiFi devices is somewhat marginal, it's altogether possible for an interruption to take place as the result of interference from other WiFi entities, wireless phones, microwave ovens, and a host of other devices that operate on or near the same band of frequencies that WiFi does. (There's a lot more than meets the mind.)
Signal interruptions and the causes are complex and can't be pinned down to just ONE source. Perhaps the magnetic case is the problem for one or a number of others, but each trouble has to be diagnosed and fixed (or understood) on its own.
Brian - Sent from my iPad using iPF