Since upgrading to MacOS 10.12.3 I am noticing wifi issues. At least twice a day at home I experience while web browsing, web pages will suddenly stop loading. I check the wifi icon at the top bar, and it does have a check mark next to my wifi SSID. During this time I can hear the cooling fan kicking it up in high gear for at least 2-3 minutes, at this time I cannot do any web browsing until the cooling fan dies down, then miraculously my wifi works as if nothing happened. Any ideas? This is a MBPro 15" (Mid 2015) model.