When I [m]ark a page and then later [t]ake it out, I brought to the beginning of the page. What I offer is that marking remembers not only the page number, but also its zooming ratio and position within the page. Cheers!
Fixed in commit 5af32f6d37ff59bf22bf76e4dfee65b119afcee1 Author: Tor Andersson <tor.andersson@artifex.com> Date: Wed Sep 20 13:57:36 2017 +0200 gl: Remember scroll position in history and bookmarks. This commit only remembers the scroll position, and adjusts for changes in zoom level.