Dynamic placeholder not resolving in Postmark email

I’m having an issue with a Pabbly Connect workflow where a dynamic placeholder in a Postmark email is no longer being resolved correctly.

This was working correctly in the past. Today, the workflow executed successfully, but instead of replacing the placeholder with the customer’s name, the email contained the placeholder data itself.

For example, I expected:

“Hey Aaron,”

But the email was sent as:

“Hey {"first_name":"aaron"},”

The issue occurs in the Postmark step, specifically in the HTML Body field.

Task history: IjU3NjYwNTZmMDYzNjA0MzY1MjY1NTUzMTUxM2I1NTQzMDBmMzUi_pc
Workflow: IjU3NjYwNTY5MDYzMDA0MzY1MjY1NTUzNDUxMzci_pc

Could you please investigate why the placeholder is no longer being parsed correctly? Nothing was intentionally changed on my side, and this functionality worked previously.

Thanks,
Sven