Apparently the Galaxy S7 Edge does not like it if you have the same SSID for both the 2.4GHz and 5GHz networks on your wireless router. Until I gave my 2.4GHz network a different name, wi-fi on the S7 Edge would constantly stop working and/or disconnect. Strangely having both networks with the same SSID never caused an issue before with any of the other multitude of devices in my household, including a Samsung Galaxy S5.