linguist loses origin attribute in xliff files

in our project we work with xliff (.xlf) files for translation.
xliff is an xml format, it describes files by the following tag:
<file source-language='de' target-language='pl' datatype='plaintext' original='/path/to/file'>

but when linguist opens and saves the file, the path is lost.

steps to reproduce:
1. open attached file in linguist
2. save it
3. compare the saved file with the attached one -> see, that the original attribute is lost