Prevent flickering when reloading document
The issue is illustrated in the attached video file. It shows the difference between
zathura when a file is reloaded over and over.
I like to use a live-updating PDF preview when I write. I do this with LaTeX and markdown files. I have my text editor set up to automatically save the file and process it with the appropriate tool to create a PDF. Zathura is nice because it reloads changes as soon as they happen. But unlike some other PDF viewers (llpp, barebones mupdf), Zathura flickers/flashes when it reloads, which is very distracting when you reload the same document over and over while you're writing.
You can see the difference between Zathura and llpp in the attached video.
Not sure how hard this would be to bring about, but since llpp has done it, hopefully you can consider doing so as well.
Full disclosure: I was one of the people who convinced the devs of llpp to make it work well in the first place. (see this issue on its GitHub). But I am thinking of switching to Zathura because I'd like something that runs natively on wayland.