PDF Contact Sheets are way too big (>100MB), no mater what dpi is selected

In fact, the pdf output files with lower resolution selections are larger than the files at the highest resolution (full; 12). Clearly, there is a problem with this version of Bridge (13.0.3.693). When will this problem and the others with Bridge Output be corrected???

If you subsequently "print as pdf" the oversized Bridge Output pdf, the file size is significantly reduced (by more than 10x).