I am having a number of issues with printing using the 'print module'.
Paper size is correct, print values are correct - send the image to the printer and I get a partial small section of my image on the page. You can restart LR but it does not clear the error. This is an expensive error as this is roll paper.
Are the printer drivers updated from Epson's website? Please post a screenshot of your print settings and check out this similar forum thread Lightroom prints partial image and let us know if that helps.