Radio mail hangs up

When sending a message using a digipeater via packet, I am able to transmit the message but at the very end, when the completion "bar" has ended...radio mail never closes out and shows that the message is sent...

I'm in a perpetual hold and eventually have to "cancel" and start over...and get the same result.

What is not closing out the message ?

IOS, Baofeng, settings:

32 Max length
Max outstanding 4
Retires 8
wait time 4 seconds
tx delay 500
persistance 63
slot 100
1200 baud

Recommendations ?