Unable to extract all rows from a pdf

Using Excalibur, my pdf contained 10 rows and only 5 rows have been extracted rest are simply blank.

The issue does not identify a file, entry point, test, or sample PDF. Start by obtaining the PDF and reproducing the extraction in Excalibur, then trace the table-extraction path to determine why five of the ten rows are blank. Done means all ten rows are extracted correctly and the behavior is covered by a regression test.

Written by the indexing model from the issue text.