- Factorio 0.15.2
- Windows 10
- No antivirus other than windows defender
- Installed directly from the website so steam cloud sync can't be a factor
- player-data.json contains plenty of other information so it wasn't simply deleted.
Edit: Mods are rso-mod, angelsinfiniteores, auto-research, bullet-trails, More signal color, More_Floors, nixie-tubes, GDIW. Failing mod is More_Floors. The bug is repeatable: every time I toggle on More_Floors and restart, then tell the game to disable it, it loses my login details.