Trouble using with Duo Security token

[Daniel Jared Domínguez]

I'm using Mosh for Chrome 0.5.5 on Chrome OS. When using with a server that uses Duo tokens, I constantly get reprompted for my password. Trying to use the reprompts to blindly use Duo does not work.

Trying authentication type Password
Password: 
Password: 
Password: 

Instead of the repeated reprompts, I should see something similar to this (example from Chrome OS's Secure Shell App):

xxxx...@xxxxx.xxx's password: 

Duo two-factor login for xxxxxxxx

Enter a passcode or select one of the following options:

 1. Duo Push to xxxxxxxxxx (Android)

 2. Phone call to XXX-XXX-xxxx

 3. SMS passcodes to XXX-XXX-xxxx (next code starts with: x)

Passcode or option (1-3): 3

New SMS passcodes sent.

Duo two-factor login for xxxxxxxx

Enter a passcode or select one of the following options:

 1. Duo Push to xxxxxxxxxx (Android)

 2. Phone call to XXX-XXX-xxxx

 3. SMS passcodes to XXX-XXX-xxxx (next code starts with: x)

Passcode or option (1-3): 

Any thoughts on what the issue is?