Deluge bug? Accessing an encrypted date field

Deluge bug? Accessing an encrypted date field

I have an encrypted date field on my form called DOB.

Calling this from a report button workflow:

  1. info input.DOB;

shows:

  1. 1018600 //not a date (encrypted text?)

Calling `info` on a different, unencrypted Date field from the button workflow correctly shows the date.
Calling `info` on an encrypted Single Line field from the button workflow correctly shows the text.
Calling `info` on the encrypted DOB field from a page load workflow correctly shows the date.

Is this a bug?
Why is it that I cannot access the encrypted DOB field but can access the encrypted Single Line field from the button workflow.
Why is it that I can access the encrypted DOB field from a form load workflow but not from the button workflow?