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It is on every URL of my website. The sidebar is on every page. I have a profile pic of me on the about us section, and every few days or so it disappears.
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.