The hotfix says “Fixed an issue that made some notables disappear when loading save files” <—Seems fixed so far in new game. Been playing about 6 or 7 hors now and they still show up and are listed as expected.
the last part seems to be important. Can you confirm that the wanderers remain after loading a game. The length of time played never made my wanderers disappear. They always disappeared after loading back into a game.