Could it be a toggle or something to set the automatic waypoints added when discovering a Waystone as "permanent" (default) waypoints instead of temporary?
I know they kind of "renew" themselves when joining the world (as temporary waypoints disappear on world exit), but it bother me seeing that red "Temporary" text inside the waypoint manager and it's a bit bothersome having to change the waypoints one by one (I am also unaware if the Temporary waypoints kind of re-add themselves if you overwrite them to be "permanent").