Lightbox moving out of column on mobile view

Hello everyone,

Bit of an odd one that I’m hoping someone could lend a hand with.

Im currently having an issue with a lightbox contained in a column underlaying itself to another part of the column on mobile view, this seems to only happen with the maximum size mobile view but is something I would like to know if can be fixed.

Please see the below site on the homepage (also excuse the layout issues, im working on it and am only a beginner into this).

Kind Regards,