oneOf change of default behaviour

[jam13]

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?

antd

Version

5.x

Current Behavior

oneOf used to behave like enum in that it defaulted to undefined unless a default had been specified. It is now defaulting to the first item in the oneOf list.

Expected Behavior

oneOf should behave the same as enum and default to undefined.

Steps To Reproduce

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

Environment

N/A

Anything else?

No response

[MarekBodingerBA]

Duplicate of #4361

[heath-freenome]

This will be fixed with the new constAsDefaults feature coming in 5.23.0 later today