Image in Issues is not showing if there's a bracket in the filename in this format - image(1).jpg
In fact - clicking on preview will show the image this way:
Duplicate of #6003.
Issue #11383 was marked as a duplicate of this issue.
Another example are all the filenames generated by Gnome Screenshot Tool:
Screenshot from 2015-10-06 00:41:44.png
Removing component: UI (automated comment)