Text Message Forwarding Working?

Is anyone having any issue with text message forwarding via iPad? When I send a text message (not an iMessage) from my iPad, it seems to start sending, after which the green sending bar disappears.

The strange thing is that when I close the messages app and reopen it, a never-ending green sending bar is once again present and it never goes away. If I send a new message, the sending bar displays ...1 of 2... and then returns to just "Sending..."

Finally, it seems that the recipient receives each message, so this is more of an annoyance than anything else.

EDIT: 6S Plus and 12.9" iPad Pro, both JB'd on 9.3.3