Perfect Matches are counted as cross-file repetitions

I recently stumbled over the following predicament: The Studio 2021 Sample Project contains five files, of which one is entitled TryPerfectMatch.doc.slxliff. This file is ideal for showing freelance users what perfect matches look like in the editor, as these users cannot generate them themselves. The file progress bar in the Files view shows that 97% of the segments have been translated. Of the 20 segments in the file, 18 are perfect matches. However, if I look at the analysis report for that file, it shows 0 perfect matches. The 18 perfect matches are counted as cross-file repetitions.

Does anybody have an explanation for this?