KDE Fedora Spin, Clipboard + Brave (Chromium browser)

Hello everyone! I would like to discuss my recent ux problem with clipboard. Whenever I try to copy an image e.g. pasting screenshot from clipboard into browser's window, nothing happens. Although clipboard assistant 'Klipper' sees the image, which is put in in, browser windows does not cooperate. Sometimes I also need to re-copy text strings, I found this very annoying. I use fedora 34. Thank you for your tips ;-)