Corner pin messes with the quality of the image

Hi, I have tracked a screen in mocha and applied the corner pin track data to a layer (same size as the comp) but for whatever reason it messes with the quality of the image.
In the photo I applied a grid effect to make it more obvious. Any idea?

I need more information to help. What version of Mocha Pro are you using? And also, have you tried the AE CC PowerPin export? What size is the image you’re using as the insert?

I found the solution, It has something to do with what frame Mocha uses as 100% scale. I had to go to the frame where the track was the largest, modify the surface and it worked.