Pivot point problems with blockbench animation

I have been having a problem where if I create an animation it looks fine in blockbench, but as soon as I export it, and re-open the file in blockbench the pivot point is reset to the defult position (0, 0). This totally ruins the animation. I have tried many solutions but none have worked, Here is the model and the animation. Also, this is what the animation should look like and here is what happens when i re-open the animation(These are clips of the animation).