Portenta AP: Evidently, simultaneous AP connection and queued web browser cause reset

To repeat: (built with latest master branch in this repository)

Have a web browser with automatic reconnect/refresh pointing to the AP's IP; e.g. - 10.0.0.1; if

WiFi.config(IPAddress(10, 0, 0, 1));

was used in the Portanta AP demo/tutorial example: [AP Tutorial](https://www.arduino.cc/pro/tutorials/portenta-h7/por-ard-ap)

Symptoms:

Usually, the first time through the demo - it'll work fine.

1) Portenta is either reset or reprogrammed - usually the latter.
2) Web page that was pointing to 10.0.0.1 is left open - i.e. - the page in firefox/mozilla is left pointing to http://10.0.0.1
3) When reconnecting to the Portenta's AP - the Porenta will reset. On a few occasions I've seen the Portenta to be unresponsive and has to be manually reset/ power cycled.

Using the same code as posted here: [42](https://github.com/arduino/ArduinoCore-mbed/issues/42)

Thanks And Regards.
John W.

Start by reproducing the reset with the code referenced in issue 42, the Portenta AP tutorial, and a browser left on 10.0.0.1 while reconnecting to the AP. Trace the failure using the repository's available diagnostics; done means repeated AP reconnects with a queued browser request no longer reset or hang the Portenta.

Written by the indexing model from the issue text.