Lightroom is treating shadows differently in library mode vs develop mode

Hello! 

I've used Lightroom for a while now with no issues, but recently, the application has been treating the shadows of my images very differently in the library compared to the develop module. The shadows look like a filter has been put over them and I'm losing some detail. And no matter how I develop it, my image's shadows always look different when I return to my library. I've calibrated my screen and reset my preferences just in case I may have changed a setting but nothing seems to solve this issue. Is this a bug or something I did with the color profiles of Lightroom? I'm genuinely lost, so any advice would be greatly appreciated!