I have been having this same problem for a while now, I still have NO IDEA how it is happening. When I play certain games (smite and overwatch it happens the most) I randomly lag out and disonnect however my skype call I am in stays up. I have no reason to believe its my modem/router however some people are saying it is my mobos onboard ethernet (MSI 970 gaming mobo). Should I just get a Ethernet card or look for other solutions?