Passing in the customValidate parameter will cause the error message under the input field to display abnormally

[wxllive]

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

When I pass (data, errors) => errors into the customValidate parameter, changing other inputs in the form causes the existing error messages to sometimes appear and sometimes disappear

Expected Behavior

When I pass (data, errors) => errors into the customValidate parameter, changing other inputs in the form causes the existing error messages to remain displayed

Steps To Reproduce

1. Create a form using the following code:

<RJSFForm
  showErrorList={false}
  liveValidate
  customValidate={(data, errors, uiSchema) => {
    return errors;
  }}
  schema={{
    type: "object",
    properties: {
      field1: {
        type: "number",
        enum: [1, 2, 3],
      },
      field2: {
        type: "number",
        minimum: 42,
        maximum: 100,
      },
    },
  }}
  uiSchema={{
    field1: {
      "ui:options": {
        widget: "radio",
      },
    },
    field2: {},
  }}
  validator={validator}
/>

2. Enter 1 in field2
3. Switch field1 multiple times and observe the error message under field2.

A codesandbox example: https://codesandbox.io/p/sandbox/j2kdsr?file=%2Fsrc%2FApp.tsx%3A34%2C13

Environment

- OS: windows
- Node: 22
- npm: 10

Anything else?

[wxllive]

I discovered the issue at https://github.com/rjsf-team/react-jsonschema-form/blob/v5/packages/core/src/components/Form.tsx#L690.
The following code changes the original { __errors: string[] } structure to string[]:

errors[errorKey] = filterPreviousCustomErrors(errorAtKey.__errors, prevCustomValidateErrorAtKey.__errors);

After changing to the following code, everything worked correctly.

errors[errorKey] = { __errors: filterPreviousCustomErrors(errorAtKey.__errors, prevCustomValidateErrorAtKey.__errors) };

[heath-freenome]

@wxllive thanks for the detective work... I'm incorporating your fix today