Can’t select text on iPad, with iOS 12

I’ve just posted a new msg in the Automators forum, which contains a url.
When I attempted to paste another link in that same msg, iOS will not let me select it. I’ve gone to the web page and done a copy of the link, using the share sheet at least 5 times. I cannot paste it, so I don’t know if this is a copy issue or a posting issue.

This is not the first time I’ve had this issue though.