Timelapse bug shrinks the canvas for a portion of the recording, then reverts to the normal size?

Whenever I export the timelapse for this one specific project, the timelapse immediately shrinks the canvas leaving a thick black border around it, only reverting to its normal size near towards the end. I have exported the timelapse of this project before and I didn't face this issue, so I don't why its acting up now. 

I tried reloading and redownlaoding the timelapse many times, yet every single time the same problem persists. 

The file size isn't the issue, since my other projects with a bigger file timelapse are still just fine. It's also not the canvas size either, because literally every other project is unaffected by this bug, including ones of the same canvas size. 

Additional info if it helps:

- At no point in time did I ever adjust the canvas size

- The canvas size is 4k

- The timelapse is set to high resolution (as with all the others)

- This shrinking occurs directly in fresco, so its not a third party issue or anything

If you know how to resolve this, please help me. It's driving me insane.