Write
\documentclass[ngerman]{article}
\usepackage{babel}
\usepackage[random]{blindtext}
\begin{document}
\Blindtext[601]
\end{document}
into mwe1.tex,
\documentclass[ngerman]{article}
\usepackage{babel}
\usepackage[bible]{blindtext}
\begin{document}
\Blindtext[1056]
\end{document}
into mwe2.tex, and issue
pdflatex mwe1 && pdflatex mwe2 && diffpdf mwe1.pdf mwe2.pdf
Change the number in the “Zoom:” field between 20 % and 230 % as you
wish (say, 186 %). Observe that on each change not only the visible
zoom changes, but also the comparison jumps to the page with the number
being equal to the zoom value stripped of the per cent symbol (here,
page 186). The screenshot is attached. Clearly, this shouldn't be the
case: while changing the zoom value, the page should stay the same.
Please fix this.
Gratefully,
Alma