When opening a pdf file, often the computer freezes for about a minute.
Without any warning or indication.
Then computer continues normally.
Of course this is a bad bug. It harms work on the computer.
This bug first appeared about 6 weeks ago.
Today still bugging me (twice today).
I reported it on UBUNTU BUGS and KDE BUGS but got no response.
https://bugs.kde.org/show_bug.cgi?id=493727
https://bugs.launchpad.net/ubuntu/+source/okular/+bug/2084017
What to do ? Any suggestions?