Knights guards cannot make a 90 degree turn at a vault

Been an issue before the recent changes to him but seems easier after the update. For instance if a survivor is running along the outside wall of shack and vault the window making it a 90 degree turn, the guard cannot follow through the window. Rather the guard runs the outside wall, gets to the window and then turn around and goes back the way it came to get inside and go to the window. Then while on the inside resumes chase and the survivor will repeat till standard comes available or hunt ends. This can be done without fail at any 90 degree turn into a vault including pallets.