Problem with CF7_get_post_var

I have defined some dynamic hidden fields on my form that are populated from post data. The form is embedded on a custom post type called Rides. Here’s the relevant snippet from my form code.

[dynamichidden RideName "CF7_get_post_var key='title'"]
[dynamichidden RideID "CF7_POST key='id'"]
[dynamichidden RideDest "CF7_get_post_var key='wpcf-destination'"]
[dynamichidden RideURL "CF7_get_post_var key='slug'"]
[dynamichidden RideStartDate "CF7_get_post_var key='wpcf-start-date'"]

Of these, all are working fine except for the RideID field, which is returning a blank value.

I also tried using the shortcode CF7_POST instead of CF7_get_post_var but neither of them seems to work.

https://wordpress.org/plugins/contact-form-7-dynamic-text-extension/