Gradient wipe creating hard lines/cropping images

Hello, I’m attempting to use gradient wipe as a fade in/out of text and photographs over video footage but i’m finding that for some reason when i use keyframes in the effect it creates this strange and unwanted cropping of the image - at first i thought i might have accidentally created a mask or something but that isn̓t the case. Hoping someone has dealt with this before and might be able to offer some advice or a correction that i may have overlooked. I̓ve attatched an example of whats happening

this is an example of the cropping

once the keyframe sequence ends the entire text comes back

this is the effects control panel

sequence settings