Yes I can confirm that unchecking that box fixed this issue. I had a pretty crammed drawing that whenever I would save as PDF, the result would look different than the SW program version as it showed the table cell heights all enlarged to the point where a balloon overlapped. When I turn this off I get what should be expected, a 1-to-1 match between the pdf and SW.
Seems like a miss on this feature. I understand how it can be useful but don't understand why it would enlarge/heighten the rows upon performing a save as.