Hello, I'm here to share my experience. I lost my save at the end of December (I was at the start of act 3). I started a game again, keeping only 6 save files that I systematically synchronized (sometimes they didn't do it automatically, so I had to change the options to disable and then re-enable the crossplatform). I finished the game last night with the constant fear of losing my adventure, but I finally finished it. Courage to those who lost their saves and thanks to the Larian team for this absolutely incredible game (but whose save bug gave me my first gray hairs)