oneOf not selecting correct default value for complex objects with the same property keys

[Becaan]

Prerequisites

• I have searched the existing issues
• I understand that providing a SSCCE example is tremendously useful to the maintainers.
• I have read the documentation
• Ideally, I'm providing a sample JSFiddle, Codesandbox.io or preferably a shared playground link demonstrating the issue.

What theme are you using?

core

Version

5.x

Current Behavior

As you can see in this example: https://rjsf-team.github.io/react-jsonschema-form/#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

The default value for complex object is not taken into account at all as well as pattern for example which i tried also.
So basically. "Sum Insured" that is a part of "Heart and Vascular System" always has the same default value of 1200 even though in jsonSchema default value for "New Plan" is set to 9000.
The behaviour that it should follow should be like the "Sum Insured" that is outside of "Heart and Vascular System".

TLDR: "Sum Insured" inside the "Heart and Vascular System" should have default value 9000 previewed when selecting "New Plan"

Expected Behavior

"Sum Insured" inside the "Heart and Vascular System" should have default value 9000 previewed when selecting "New Plan"

Steps To Reproduce

https://rjsf-team.github.io/react-jsonschema-form/#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

Environment

- OS:
- Node:
- npm:

Anything else?

No response

[nickgros]

@Becaan thanks for the report, this is definitely a bug. The regular maintainers don't have much time to fix all issues, are you interested to investigate a fix?

This looks similar to #3892, which dealt with allOfs, which was fixed by #3969, so that PR may be a good place to figure out where to start