P2P connection fails

[Gremgoblin]

Hello,

I've been having an issue where I can get into a game just fine and play for about 45 minutes before the P2P connection to one (or more) people fail. The problem isn't my internet as I am able to alt tab and continue using the internet just fine. I have already opened up my ports for the game, and I was playing the days before just fine so this shouldn't be an issue. It seems, somehow, to have come out of nowhere. I have attached the relevant files. Please, help!