Workday Yubikey error

Hello I have setup DUO to work with our Workday application. It works great with DUO and a DUO with Yubikey combination. When you login you can select push or enter in the code with the Yubikey. However if I have a user setup with just a Yubikey the user is prompted with a DUO screen with no options, there are no buttons to select. I tried asking the Workday support but haven’t gotten a response so I am hoping someone here has experienced this issue and can help out.

Workday’s Duo integration does not currently support users with only a hardware token. A user with a phone AND a token assigned is able to authenticate using a token. This is the first known issues listed here: Duo Protection for Workday | Duo Security.