Post Process Screen Percentage Issue

I was having an issue following a tutorial video on how to create something and I can’t seem to get past an issue that causes the screen to not be fully affected by the post process as well as the perspective becomes unaligned with the full rendered screen

My video of the bug.

The original tutorial I was following

I’m simply looking for a way to fix my issue in the short term, but if it isn’t possible I’ll just disable it until a fix is implemented.