Hello Snooper, and welcome.
It's often a good idea, following a major update, to go over all configurations settings in the menus. In wireless and networks we often see default changes, along with other things.
Also, and this is what really grinds my gears sometimes, we see reports of users having to do a factory data reset to bring things around to full functionality after going from one version of Android OS to another. Your mileage may vary.