Comment with attachment gets lost in Sprintr

In Sprintr, on Tab 'Wall': Commenting on a story-comment by typing some text and concomitantly attaching a document. Upon pressing 'Post comment'-button the text is lost (=not posted) and the document is not found under the documents-tab. However, in some rare occasions the document is found under tab 'documents' while the text is lost. Surprised that this potential bug has not been mentioned earlier (see also comment).
1 answers

Have you tried submitting this as feedback in Sprintr itself (the black feedback rectangle on the right) ?