This same thing just happened to a co-op Isle of Siptah game. My husband had all journey lost and knowledge reset. I lost all journey and knowledge without a reset…all my points are still spent. PS5, wired connections. No error when last closing the game and upon closing the game the game is always closed and ps5 always turned off. Current save was last night and we started the game less than a month ago. We were on levels 40 and 37 respectively. We had most if not all stations on improved/not master and we were on master mason blocks.