The PDF generator uses a lot of ‘keep with next’ rules which can sometimes be over-zealous and over time, Lawmaker team are refining these so that they work as expected. In the meantime, if you find a PDF contains a lot of unexpected whitespace, have a go inserting page breaks which can sometimes overrule/avoid these overzealous ‘keep with next’ rules. Please still report the issue to the Lawmaker Support Portal as this will help refine these rules overtime so that you hopefully won’t need to use the page break option in future.
Workaround
Open the document in the Editor
Place cursor at the end of an element/provision and right-click and select Insert Page Break
Generate a PDF to check whether the page break has solved the whitespace issue
If not, you might need to undo the page break and try inserting it somewhere else.
see Inserting page breaks for more information