No mods, not even reshade, it's just the game and that's it. I'm seeing reports of this on the Steam and GoG forums, and the official CDPR forums too. It seems to be known simply as the "Whoa! Cyberpunk 2077 has flatlined!" issue (or just "Cyberpunk 2077 Flatlined" issue). I've googled all I could. I've seen all the suggested solutions. I've tried literally all of them. Nothing worked. It's a bug that can be traced all the way back to basically the game's launch in December, some people had it then. I didn't. For me it's a 'new' bug I never had at the time. Then again I only played my saved game for about 40 hours total, and stopped just a bit after 1.05 came out. I only reinstalled for 1.2 to check things out a bit.