The "copy share link" failed with a success message. This resulted in my pasting what was previously in my clipboard into the chat while running an interview.
I'm using Miro in Firefox 102.10.0esr (64-bit) on Debian.
It might be helpful to provide the url in a text-selectable way so platforms without copy/paste access can continue to copy a url before trying to target every platform's clipboard API. Copying the url from the url bar worked, but it was unclear if it should.