I just had a look in the Hero's Path and it's showing me some kind of teleport jump I seem to have performed:
It looks as if I teleported to a place I've never been before, which is not near a Shrine, Beast, or whatever teleportation target. I walked a few meters and then teleported away. You can clearly see that I never walked there, so I couldn't have placed the Travel Medallion there. You can find a recording here.
How did I perform this jump?