Space scrolling by 1 pixel too little

On zathura 4.1, hitting space in fit page mode (a) scrolls by 1 pixel too little, so that the boundary between 2 pages slowly goes does with respect to the window, like so:

There is the same issue with Shift-Space.

I'm running Fedora 29 with the following configuration:

• zathura 0.4.1
• girara 0.3.0 (runtime: 0.3.0)
• (plugin) djvu (0.2.8) (/usr/lib64/zathura/libdjvu.so)
• (plugin) pdf-poppler (0.2.9) (/usr/lib64/zathura/libpdf-poppler.so)
• (plugin) ps (0.2.6) (/usr/lib64/zathura/libps.so)
• (plugin) cb (0.1.8) (/usr/lib64/zathura/libcb.so)