I hope you are well today and thank you for your question.
It seems you have created the pages using the below plugin so please make sure that the plugin is active on your website.
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I visited the website and tested it several times but the image displays fine for me.
This can be due to plugin conflict on your site so please when you face the issue then try temporarily deactivating all plugins except Unyson, Redux framework, and WpBakery page builder plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.