Motion Path stops working when curve is edited

[Anonymous]

I am currently trying to animate a camera through a scene and I am using motion paths to do this.

The way I have it set up is I have a 'Camera and Aim' parented to a locator and then the locator is constrained to the path using 'Attach to Motion Path'. 

This is so I can still control the aim of the camera whilst it is going along the motion path

The issue is when I go to edit the motion path curve using edit point, the camera stops following the motion path. Even when I  CTRL + Z the chage that I made it still does not go back to working. It just breaks it for some reason.

I have also tested this using a polygon shphere instead of a camera and I am getting the same issue

Thanks

[Anonymous]

I have managed to solve this by changing the Evaluation Mode to DG under Preferences --> Animation. Then change evaluaton from Parallel to DG

I hope this helps anyone who may be having the same issue