Towards the end of a hunter run, I began using the echoes to get the saint/monk passages via eating one blue fruit, starving, fixing the starve and meeting an echo. It was going fine for the ones at the wall, SB and FA. Then, when I starved in industrial and went to meet the CC echo, something weird happened. Once I met the CC echo and hit continue, it played the intro sequence for hunter entering the farm arrays on cycle 19. I exited to the main menu and all 3 campaigns were reset. My other 2 save files are fine but this one just lost all of it, save for Hunter still being accessible to play. This is in the video "2022-12-15_14-17-19.mp4"
In the attached video "wtf2", something happened that is the only thing I can think of that may have caused this aside from cosmic radiation. A scavenger stole a spear (at least, I think it did) right as I went through a pipe and it went through a different pipe. I went to the correct destination like normal, but then the camera quickly changed to somewhere completely different in CC, which I think is the other end of the creature-only pipe. I don't know if this is part of why my save reset but seeing as how this is the first time either of these bugs have happened to me I feel like they might be linked. Never has starving and meeting an echo done something like this, and I don't have any mods or a mod loader on this copy of the game, although I do have a 2nd folder with 2nd copy of the game that is modded. The vanilla one I'm playing on was made by renaming the modded folder and re-installing the game on steam.