Wow! Seems the latest work on Okular closed a few bugs, some of them have been around for 10 years (or at least that’s how far the official bug reports go back)! This might actually even be motivation enough to upgrade my OS and try to pull in the latest version of Okular on top. 😀 Maybe some day PDF annotations become even usable on a Linux desktop – this is pretty much the only reason I keep a virtual machine with Windows+Adobe Acrobat around.