Solved for me at least chapter 12 bug
I was stuck at the chapter 12 loading bug.
I had patched my game and I was stuck at the LIMB clinic. I had made a backup of my saves before I had patched. So I uninstalled the game replaced my game saves and re installed with no patches. I was able to go past the limb clinic.
Now I understand that this will not work for everyone But I am a firm believer of as many saved games as possible just in-case this happens.
This had happened in chapter 5 but I was able to recover with an earlier game save.