Disconnecting often

Hey, I feel a little lame asking this but I’ve been getting a little frustrated with a bunch of disconnects in my game lately.

When I first installed everything was running fine, then me and my buddy started playing together and suddenly we’re getting lots of disconnections. Is this normal? Was I just getting lucky at the beginning?

Sorry if this is a redundant subject that people ask about, I’m just looking to see if anybody has any tips or fixes for this