I just viewed the attachment page for one of my images in my Media Library, and I discovered that the image also appeared within the widget areas which are using the Content Block widget.
I also discovered that if I enabled "Do not apply content filters" on those widgets, then the image ceased to appear there. However, that's not a workable solution for me, as I need to keep the <p> and
breaks in the Content Block widget.
I've seen in your FAQ, and in other posts here on the Support forum, that badly written plugins can cause this problem. However in this case I'm viewing a media attachment page, and not a page generated by some other plugin. So the problem seems to be part of WP itself in this case??
Is that correct? And is there anything I or you can do to fix this?