Report the cause of issues
When reporting usability issues to your stakeholders:
DON'T: Users are not sure how export works.
DO: Users are not sure if the export button exports the file details as a file, or it exports the file itself. The user expects the latter but the layout suggests the former to him.
The first example tells that there is a usability issue and nothing else. The Designer wouldn't know how to fix it. The second example tells the reason why users experience it as an issue. That's something a Designer can go and fix. This is actionable. The other is useless.