Weird, seems to work fine for me. Tried it yesterday when I had a few minutes, loaded my old savegame, left the beta area, etc. saw nothing unusual.
Maybe it depends on the save. I had a save from around half year ago and had this bug.
It depends on how old the savegame is apparently. inXile has changed the way the screenshots in the loading screens are stored in between so really old savegames mess up the loading screen really good, newer ones from early access don't.