My blog sends out as
og:image an image 32x32 pixels, because theme used does not support featured images and there are no images in the shared article itself. Such small images are (should be) too small for Facebook to include along with share.
This is confirmed by both Facebook Debugger:
and Facebook Sharer:
neither of these two contains image, when testing my share.
And so the shared post, when editing it for the first time:
Yet, when share post is finally made, few minutes later, scratchy, pixelized 32x32 image appears:
What can be causing this and is there any way to block this?