Visual Portfolio plugin provides the powerful solution for image loading optimization called “lazy loading”. It is working fine, but sometimes it may conflict with 3rd-party lazy loading solutions, provided by installed theme or 3rd-party plugins.
We recommend disabling 3rd-party lazy loading solutions and use ours by enabling it in Admin Menu → Visual Portfolio → Settings → Images.
In case it is not possible to disable 3rd-party lazy loading, you have the ability to disable ours – https://visualportfolio.co/docs/settings/images/