When I delete images it doesn’t update on the front end

Hi. I am really enjoying using this plugin. I am not so familiar with code therefore I used elementor dynamic tags to insert the ACF photo gallery. It worked well but when I started deleting images it is not updating on the front page. I think this may be because the dynamic tag is set to “post image attachments” instead of ACF. But there is no ACF in the dropdown. Please advise me. Thank you!