Tiny vertical deviations in presentation mode

[fkranhold]

I am running zathura 0.5.8-1 with zathura-pdf-poppler 0.3.3-1 on sway/wayland (Arch), on 2880×1800 screen. When opening PDF in presentation mode (in my case: a LaTeX beamer presentation with 11 pages) and browsing through the slides, I noticed that the page is sometimes vertically off by 1–2 pixels. I assume there is some rounding mistake? (I did not use fractional scaling when having the issue.)