I am using Xubuntu 20.04, Ubuntu Mate 20.04 and Lubuntu 20.04 in parallel and since the latest Kubuntu 20.04. In all except Kubuntu Eddie is displayed correctly. They were all installed in the same way. I don't know if this is a general problem with Kubuntu/KDE/QT or if one or more packages have to be installed to make Eddie work as it should. In any case it looks like here on Kubuntu:
I am using Xubuntu 20.04, Ubuntu Mate 20.04 and Lubuntu 20.04 in parallel and since the latest Kubuntu 20.04. In all except Kubuntu Eddie is displayed correctly. They were all installed in the same way. I don't know if this is a general problem with Kubuntu/KDE/QT or if one or more packages have to be installed to make Eddie work as it should. In any case it looks like here on Kubuntu: