Splitter: converted PDFs may become big after splitting

Unfortunately, there are still PDFs for which the Splitter does not work correctly,  i.e. the split documents each have the same (full) size as the original document. At least the following converters have been identified to cause this behaviour:

• PDFs created via the online PDF converter https://online2pdf.com/
• PDFs created using the PHP library fpdf http://www.fpdf.org/

Attached you find a PDF generated using https://online2pdf.com/.