u/TrekThroughTheStars

Not sure if this is isolated to just ProtonVPN, but after recent updates we've been dealing with massive amounts of packet loss every so often on our WG tunnels. Didn't matter what server I set up. It would work for a bit and then just out of nowhere start dropping packets. Turns out the Proton RoadWarrior setup may be a bit dated. MTU settings are too big. Even setting it to 1300 was too big. Once I set to 1280, I stopped losing packets. Not sure if this will be a permanent fix, but if anyone else encounters this (seen some reports), this is how it was fixed for us.

UPDATE: Issue returned. Turned MTU down to 1200. Fixed again for now. Not sure what the hell is happening