In Krita 4.0 beta 1, when the canvas has certain zooming rate, like 17%, 33% (using keyboard +/-), calling popup palette with right click causes the zoom rate to jump a bit, but the number in status bar doesn't reflect that. The status bar will only update after an extra keyboard +/- command after closing the popup palette. Zoom rate like 25% and 50% are not affected. Tested with Manjaro Gnome 17.1.1, krita-4.0.0-beta1.1-x86_64.appimage, OpenGL enabled. AMD Firepro W5100 with open source driver.
Is that with a right-click with a stylus or a mouse?
I can reproduce it with master, though for me the pop-up palette is set to a hotkey, and not to right-click.
Both stylus and mouse right click can trigger this. It seems that only 25%, 50%, 100% zoom rate are unaffected.
I'm pretty sure that this is some kind of rounding going on after commit commit 41ad9e5894199d857a77d7f3387ef0914427b840 Author: Scott Petrovic <scottpetrovic@gmail.com> Date: Mon Feb 13 17:51:59 2017 -0600 make sure slider is in the right position when the 100 percent zoom button is pressed
Git commit e67ed09bd7df38a2e853630c9dba41110007308c by Scott Petrovic. Committed on 18/01/2018 at 13:43. Pushed by scottpetrovic into branch 'master'. M +3 -0 libs/ui/kis_popup_palette.cpp https://commits.kde.org/krita/e67ed09bd7df38a2e853630c9dba41110007308c