You can send it to support.
https://digitalextremes.zendesk.com
Send it as "Logs and Metadata", with the catogory "Level/map Screenshot metadata".
And include the screenshot.
Important that it has to be the raw screenshot. So the one you got with pressing f6. Add it as attachment (don't upload on imgur or something)
That way they have the metadata, and know the exact place of the rock.