when loggeed in work mode some images are invisible but show in preview and published mode

I’ve recently noticed when in the sitebuilding plus online version some of the work previously published has gone invisible when I’m working in the page, it’s still there in preview mode and published but not there when I’m working in the page. the shape sizes of the images are there but the actual images are invisible.

I checked this from multiple computers same problem. This is now happened to multiple sites on have.  I have cleared the browsers chache and cookies and some came back but not all.

Would someone kindly offer the actual solution. If you did not have the actual solution please do NOT suggest