A game that has been loaded or started up from the Main Menu without quitting all the way to the Desktop first (or Origin if on 1.69) will have a chance of doing this and will have a chance of becoming corrupt/unplayable after a while. Traveler doesn't technically cause the issue, it's an EA glitch that RAM is not being cleared between world loadups within the same game session, but Traveler certainly makes it more likely to happen and be harmful to that ongoing save.
I know this isn't exactly what you are saying here, but we've heard the argument that players just couldn't be bothered to quit the game entirely before loading up a different world before and they insist that they will keep doing it their way. We wish them luck and say goodbye essentially, or suggest that they find a way to play without Traveler then. :/
