Hi, I want to segnalate this issue of the Print widget:
when you set "force scale" the pdf is not printed in the right scale (the bar scale is correct).
I think that probably is an issue related to the title block of the PDF printing
example: I set "force scale" 1:2.000 and print the map. I measure the map and it is not in 1:2.000 but in approximately 1:2.150, the scale bar is always correct however