So when rendering videos I noticed that the right hand side of the video stretches. It is not a large portion of the video but noticable enough to be annoying. I am unsure how to fix this. Doesn't matter what dimensions I use for the video either.

For extra details a lot of what I edit are instagram videos however some videos that I've edited are also just 1080x1080

Others have been 360x640. Whenever I render a video I make sure that in the render options they match the dimensions of the video while I am editing. The image below is a file that I had playing in my media player so the extra black part on the right is not part of the rendered video. Circled in red is the edge where the stretching is most noticable. It does this in all of my videos no matter the render size, even more traditional dimensions like 1920x1080 or lower are not safe.

The program is movie studio 16.0 platinum and I'm working on my Dell Inspiron 15

It is a rather old laptop I got back in 2015-2016. Unable to replace it anytime soon.

It didn't do this before please help!