Required option on a sub sub sub document failed validator

[dreimert]

Do you want to request a feature or report a bug?

Report a bug in last version 6.2.8 but not in 6.2.7 or before.

What is the current behavior?
Required option on a sub sub sub document failed validator :

<$pwd>/node_modules/mongoose/lib/document.js:2953
    this.$__.validationError = new ValidationError(this);
                               ^

ValidationError: Test validation failed: list.0.list.0.name: Path `name` is required.
    at model.Document.invalidate (<$pwd>>/node_modules/mongoose/lib/document.js:2953:32)
    at EmbeddedDocument.Subdocument.invalidate (<$pwd>>/node_modules/mongoose/lib/types/subdocument.js:213:12)
    at EmbeddedDocument.Subdocument.invalidate (<$pwd>>/node_modules/mongoose/lib/types/subdocument.js:213:12)
    at <$pwd>>/node_modules/mongoose/lib/document.js:2742:17
    at <$pwd>>/node_modules/mongoose/lib/schematype.js:1324:9
    at processTicksAndRejections (node:internal/process/task_queues:78:11) {
  errors: {
    'list.0.list.0.name': ValidatorError: Path `name` is required.
        at validate (<$pwd>>/node_modules/mongoose/lib/schematype.js:1321:13)
        at SchemaString.SchemaType.doValidate (<$pwd>>/node_modules/mongoose/lib/schematype.js:1305:7)
        at <$pwd>>/node_modules/mongoose/lib/document.js:2734:18
        at processTicksAndRejections (node:internal/process/task_queues:78:11) {
      properties: {
        validator: [Function (anonymous)],
        message: 'Path `name` is required.',
        type: 'required',
        path: 'name',
        value: undefined
      },
      kind: 'required',
      path: 'name',
      value: undefined,
      reason: undefined,
      [Symbol(mongoose:validatorError)]: true
    }
  },
  _message: 'Test validation failed'
}

If the current behavior is a bug, please provide the steps to reproduce.

const mongoose = require('mongoose')
mongoose.set('debug', true)

const testSchemaSub3 = new mongoose.Schema({
  name: {
    type: String,
    required: true
  }
})

const testSchemaSub2 = new mongoose.Schema({
  name: {
    type: String,
    required: true
  },
  list: [testSchemaSub3]
})

const testSchemaSub1 = new mongoose.Schema({
  name: {
    type: String,
    required: true
  },
  list: [testSchemaSub2]
})

const testSchema = new mongoose.Schema({
  name: String,
  list: [testSchemaSub1]
})

const testModel = mongoose.model('Test', testSchema)

async function run () {
  await mongoose.connect('mongodb://localhost:27017')
  await mongoose.connection.dropDatabase()

  const entry1 = await testModel.create({
    name: 'lvl1',
    list: [{
      name: 'lvl2',
      list: [{
        name: 'lvl3',
        // list: [{
        //   name: 'lvl4'
        // }]
      }]
    }]
  })
}

run()

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.

Node.js: v16.13.2, v16.14.2 and v17.8.0
Mongoose: 6.2.8 (no bug before)
MongoDB: v4.4.5