Generate Press Premium & Post Grid Pro issue

I have generate press premium installed with the new Wordpress 5.0.2. I had post grid pro plugin installed before upgrading to generate press premium and before upgrading wordpress. It worked fine. Now the images are loading on top of one another. I am trying to isolate and identify the problem.
It could be related to the theme upgrade or the wordpress ugrade. I also added featured images to every image in the correct size to reduce loading speed. The hide feature image plugins weren't working with the new wordpress so I used the code you provided:
.entry-title {display: none;}
.page-header-image-single {
display: none;
}
It works effectively. I tried removing it and it didn't fix the scattered image issue.
I also have WP Rocket plugin with settings to minify css, javascript and html. I tried turning this off and it didn't seem to make a difference. I'm not certain this is a generate press theme issue, I'm still trying to identify the source of the problem. Any help you can provide would be greatly appreciated. Thanks!