That looks like a bug in Chrome's PDF viewer. You'll notice that the fields get cut-off right where the right side of the page would be when "fit to page" is not selected. You can report bugs in pdfium here: Issues - pdfium - PDFium - Google Project Hosting
Regarding Safari, if it's using the built-in PDF viewer (Preview), it has lousy support for PDF forms and does not draw the fields the same way that Adobe does with Acrobat/Reader, so there can be differences in field appearances.