Random Header Images not working properly

I had to migrate our site (https://www.nemzotics.com) to a new web host and now the images don’t come up randomly like they used to. I updated the Picolight theme to version 1.1.16 thinking that may resolve the issue. There is a different photo for each page but the same photo stays attached to the same page instead of rotating like it used to. Could you please help me resolve this issue? Thanks!