Genesys Cloud - Main

Hello,

I'm facing an issue with script variable namespaces in an Outbound Progressive Dialer campaign and hoping someone can point me in the right direction.

Setup:
- Outbound Progressive Dialer campaign
- Script assigned in campaign configuration
- Script uses {{outbound.CUSTOMERFULLNAME}}, {{outbound.CUSTOMERID}}, {{outbound.CAMPAIGNKEY}} etc.
- Queue: in-queue flow and a default script assigned

Problem:
When an agent receives a direct outbound call, the script works perfectly - all `outbound.*` variables populate correctly.

However, when the agent schedules a Callback during the interaction, and that callback is later delivered to an agent, the script variables show as `dialer.*` instead of `outbound.*`. The fields appear empty because the script is bound to `outbound.*` namespace.

I can confirm this from the browser console which logs:
`scripter-ui--root: Found unknown bindings { "detail": "dialer.CAMPAIGNTYPE" }`

What I've tried:
1. Created a separate script with `dialer.*` variables - Scripter reverts them back to `outbound.*` automatically on save.
2. Added a **Set Participant Data** block in the Outbound Architect Flow (before Transfer to ACD) to map `outbound.X = dialer.X` - did not resolve the issue, likely because the Callback interaction does not pass through the Outbound Flow.
3. Checked the In-queue Flow - it only handles queue wait logic (hold music, play audio, disconnect) and is not related to callback delivery.

Question:
What is the correct way to ensure that `outbound.*` script variables are populated when a Callback interaction is delivered to an agent from a Progressive Dialer campaign?

Is there a recommended approach using:
- A dedicated Callback Flow in Architect?
- A Data Action within the script to fetch conversation attributes via API?
- Some other configuration I'm missing?

Any guidance would be greatly appreciated. Thanks in advance!