Runbook Scoped Variables not shown on the Variable Preview Page

[Clare-Octopus]

Severity

Not blocking customers, variables can be viewed on the 'All Variables' page

Version

All Octopus Versions

Latest Version

I could reproduce the problem in the latest build

What happened?

If you have a Project Variable scoped to a runbook:

It wont show on the Variable Preview page because you can only select Deployment process variables:

However, you can see it on the All Variables page:

Reproduction

1. Create a project.
2. Add a Runbook with a basic step (ie Run a Script).
3. Create a variable and scope it to the runbook process step we created in step 2.
4. Go to the All Variables page and see that variable displayed.
5. Go to the Variable Preview page and see it not displayed.

Error and Stacktrace

N/A

More Information

Customer ticket (internal) - https://octopus.zendesk.com/agent/tickets/252312 RnD (internal) - https://octopusdeploy.slack.com/archives/CNHBHV2BX/p1757426005188809

Workaround

View the runbook scoped variables from the All Variables page.