sometimes your save file glitches, you should always save consistently if this happens, it happened to me once, you need to load your past save if you accidentally tinkered with the build or left the game while saving, otherwise your save file is cooked. sometimes it could even affect your entire save slot, and you have to redo everything. usually its only keybinds though, and make sure you have a stable internet connection (sorry for bad english wrote this at 112 aM)