Forms - PDF Export missing data from bottom of page?

Hi there, 

I have been using a simple form for almost a year to collect responses to 10 different questions. In the last few weeks when I export the form as a PDF the bottom question is being completely missed off. 

When I change the destination to a printer and adjust the scaling so it's smaller it resolves the issue but it's not possible (as far as I can tell) to carry this scaling over to the save as PDF destination.

Anyone able to help with this as I'm currently not able to do anything with my form? 

Thanks 

Ryan