image rollover on website seems broken

Site URL: https://www.jpvine.com/

hello,

My portfolio page as images appear when you hover over the links- except for some reason it stopped happening.

- are images hovering when for example you hover over 'film?'

-is there a particular bit of code needed?

any help appreciated! the attached images show what it's supposed to do when you hover

ok thanks - for some bizarre reasons both of the browsers on my home pc don't do it- thanks for checking.