Format shortcode in mail not working

When in a [field_group] the Contact Form 7 shortcode [_format] does not work, it outputs the shortcode.

e.g.
In the form I have:

[field_group name id="name" tabindex:1] 
[date* your-date]
[/field_group]

Then in the mail I have:

[name]
 Date: [_format_your-date "d-m-Y"] 
[/name]

In the email it outputs as:
Date: [_format_your-date “d-m-Y”]
Date: [_format_your-date “d-m-Y”]