My partner noticed this too, but after a couple of tries the same button will work again. Really hard to debug unfortunately. It usually worked after a couple of tries.
I just pushed a fix that greys out the link if there's no URL, hopefully that helps?
Super embarrassing. I fixed this now. I used event.target which was just the SVG of the icon if you clicked that instead of the text. (I also split the share button in two to make it easier to share)