Hopefully someone will be able to help me here. I’m getting a strange issue when creating a post with an image attachment or gallery.
As can be seen in the attached image, when I create a post with an image in it, I get two small empty boxes displaying above the image. I’ve indicated the boxes with the red arrow. An example post can be seen at http://laura-campbell.co.uk/499-2/
Web inspector identifies these boxes as span.picturefill-wp-source.thumbnail and span.picturefill-wp-source.retina.thumbnail respectively.
The issue appear regardless of the image size setting in the gallery dialog.
If I remove the image / gallery from the post then the mystery boxes also disappear as I would expect.
I assume it is some sort of bug in my image / gallery display but I can’t identify what is causing it.
I hope you are well today and thank you for your question.
I visited your shared post and found it is displaying because of span tags added above the image which you described.
I am not sure why it is getting added because it is working fine on my test site.
Please make sure it is not added in the content by switching to the text editor mode.
This can be due to plugin conflict on your site so please try temporary deactivating all plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.
You can try hiding those span tags by adding the following CSS code in the Custom CSS option of your theme on the below path.
Admin Area -> Appearance -> Customize -> Activello Options -> Other -> Custom CSS
