Hi !! Sorry for the delay. I was not notified by your answer. The problem still persists. I tried to install a flatpak but the same occurs.
> Does the presence of libreoffice-kde5 make a difference (which is > in 6.1.x bascially a disguiseed gtk3 with a kde5 file picker)? I see > below you have it installed (-kde being for kde4 in stretch gets > replaced with that one.) > Does it also happen with -kde5 from 6.2.0 (which has a "native" KDE5 plugin > instead of that gtk3 thingy.) So i need to unnintastal libreoffice-kde5 ? New link to the image https://imgur.com/a/C65Cib9 I discovered the same bug report in bugs.kde: https://bugs.kde.org/show_bug.cgi?id=402044