Sometimes it will just outright crash when trying to load a save file, the game will get stuck and freeze on loading screen. There are also issues with Auto-Saves as well. Sometimes the game will forget you had an Auto-Save and then revert you back 3 saves earlier. Completely unstable and reverting your progress. Wasn't able to progress past getting the Keycard in the warehouse because it would always crash after game over, and the door to leave the warehouse is locked preventing you from leaving after getting the keycard. Reloading from Auto-Save will just crash the game and keep you from progressing any further past this point.

Sometimes it will freeze crash on loading, other times it will glitch out completly preventing you from progressing anything at all such as locked door or drawer that would otherwise NOT need anything to unlock them. The office door you start in will be permanently locked after the first escape from the cat animatronic where you have to return to the office to answer the phone call, if you close this after the cat leaves the door will be permanently locked.

If you try to get the lockpick set from the drawer after the phone call in the office the drawer will be locked when it needs nothing to open after watching the bull animatronic smash through the window. The game will completely break here preventing you from opening the drawer, and after first inspecting the jaw on the tablet a second time you will be trapped inspecting and unable to escape.

instability issues, broken game bugs preventing any kind of progress past a certain point as for the previously mentioned game breaking bugs that locks things without explanation when they're not suppose to be locked, or locked explicitly until after a cutscene has played, but never unlocks after this.