Tokens don't work under the program cloned by REST API

Hi,

I used Clone Program REST API to clone a program that contains a local My Token, an approved email, and a batch smart campaign. Then I ran the campaign to send the email under the new cloned program. However, the tokens in the email did not work (see below). The email contains a lead.FirstName token and a my.My Token:

Dear ${lead.First_Name_1_0},

${my.My_Token_1_0}

But when I clicked Edit Draft for the email and approved it again, the token could work well even if I did not do any change:

Dear tester,

This token has been replaced.

Besides, if I clone the program on Marketo UI manually and send the email, the tokens also work.

Does anyone have the same issue? Is a Marketo bug or is there anything I missed?

I would like to used API to clone programs and send emails with tokens, how can I make it work?

Thank you in advance!