Yeah, still not sure why only one of the team ran into this, but the solution for us was the combination of the Set-NetIPInterface commands above and replacing the /etc/resolv.conf file as described here or here. (The resolv.conf fix by itself was no...
My team member had this problem too. Of three people on my team with nominally the same setup (Ubuntu 18.04 in WSL2), only one has run into this. Setting the Interface Metric initially fixed it, but then after a few hours (without restarting the VPN ...