xfce – xfce4-terminal doesn’t want to directly run middle click paste (after upgrade from Mint 20.3 to Mint 21)

I just upgraded from Mint 20.3 XFCE to Mint 21 XFCE. All is well, but the xfce-terminal doesn’t directly execute anymore the pasted commands (which contain Enter at the end). Previously, when I copied a command, or a sequence of commands from a text file or a website, and then pasted them (with middle mouse click) directly in the xfce-terminal, it simply ran them. Now, it marks the pasted text white and wants me to hit ENTER. What happened, how can I make it simply run the pasted text directly just like it used to?