I got wind of the the migration of FOSS projects to libera.chat and so followed suit with my Konversation installation. I wanted to get a glimpse of the available channels, so I pressed F5 for the channel list, refreshed it and saved it to a file for archive purposes, as I do every few months. But then the GUI did not react to mouse input anymore. There was no CPU load, so it wasn’t a typical infinite loop. Next I tried Ctrl+Q and it worked: I got the “Do you want to quit” dialog. I cancelled it, and now the GUI worked again. My current Konversation package is part of KDE 21.04.1. This is the first time I encountered this problem. The last time I used this feature, it was working normally, running on KDE 20.12.2.