WSL Ubuntu cycles through Agend pid #'s endlessly until I press cntrl c on startup or login

I've got an ubuntu installation that is running some software for my company, and I've added some paths to the .bashrc file. When I start WSL with wsl -b ubuntu, it prints out this, and keeps going until I hit control-c.

Agent pid 549
Agent pid 556
Agent pid 563
Agent pid 570
Agent pid 577
Agent pid 584

This is the line I've added

export PATH=$PATH:/usr/local/go/bin && source $HOME/.profile

Do I need to add something else, or a kill statement?

If your ~/.profile is based on the default Ubuntu one (copied from the /etc/skel directory on account creation), then you'll notice that it contains the following lines:

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

in other words, ~/.profile sources ~/.bashrc when it detects that you are running a bash shell. The intention is to make login shells behave as similarly as possible to interactive non-login shells.

Hence if you also source ~/.profile from ~/.bashrc, you end up in an infinite loop in which one file repeatedly sources the other.