After upgrading to Fedora 34 the copy&paste in xfce4-terminal (and gnome-terminal) is broken. Both middle-button and paste from menu paste the text into the terminal but the pasted text is highlighted and it does not take any effect until I type something on the keyboard.

So it is for example not possible to select a whole line from the terminal screen and just paste it and have it immediately executed by the shell. I have to press enter again to make the paste actually an effect.

If this is some kind of "security improvement" can it be switched off?

rpm -q vte291
vte291-0.64.2-1.fc34.x86_64