Request vars in body referring to environment vars are not interpolated when listed subsequently

[Sylvannes]

I have checked the following:

• I use the newest version of bruno.
• I've searched existing issues and found nothing related to my issue.

Describe the bug

Took us a while to figure this one out, because at first we thought this must be the #1910 bug, but apparently it's a little bit more nuanced than that.

Bug: When creating request vars that reference environment vars in the POST body of a request (both TEXT and JSON), you cannot list them subsequently in the POST body or any subsequent replacements (beyond the first!) are not done.

Example. I have two request vars that reference environment vars:

These are valid secrets in my active environment and you can see that in the request they are listed green due to their interpolation (irrelevant UUIDs to display the bug):

And I use them in my POST body as such:

In this case, only the FIRST value will be replaced as shown in the timeline of the request:

This is true for any amount of subsequent request var -> env var interpolations.

BUT if we throw a local request var (without interpolation) in between, it will work, e.g. this request:

Does suddenly interpolate both reference values properly:

Looks like some sort of loop error when interpolating nested variables multiple times in a row.

---- edit: This was tested on both Windows and Linux platforms and reproducible on both.

Thank you for building great software, we are very happy to start switching over to using Bruno.