I found a bug in Castlevania Portrait of Elegance with Richter & Maria mode, when Maria jumps she crosses part of the platform where she collides when jumping
I'm not quite sure what do you mean, and the image you seemed to attach doesn't show up at all, I think the link to the image is missing.
Do you have a proper image or a video of the issue?
This hack doesn't touch any in-game sprite at all, much less anything gameplay related.
It only modifies the portrait images and a couple palettes, nothing else, so if that happened, it's most likely caused by a wrong base ROM, or a glitch in the original game.