Deeply nested document doesn't get timestamps created/updated

[kravorkid]

Prerequisites

• I have written a descriptive issue title
• I have searched existing issues to ensure the bug has not already been reported

Mongoose version

6.3.6

Node.js version

16.14.x

MongoDB server version

5.x

Description

Hi, i found this issue that could be related,
but in my use case i've tried to make a deeply nested array of subdocument with timestamps but it looks like it doesn't work.
There is no mention of such a limit in the doc, if you can enlighten me on that i would be glad !

Steps to Reproduce

import mongoose from 'mongoose'
const Schema = mongoose.Schema

const nestedSettingsSchema = new Schema({
  value: String,
  active: Boolean
},
{
  timestamps: true,
  _id: false
})

const userSettignsSchema = new Schema({

  nested_settings: {
    settings_prop: [nestedSettingsSchema]
  },
  other_settings_props: String
}, { _id: false })

const userSchema = new Schema({
  first_name: String,
  last_name: String,
  settings: userSettignsSchema
}, {
  timestamps: true
})

const UserTest = mongoose.model('UserTest', userSchema)

const addUser = async () => await UserTest.create({
  first_name: 'jon',
  last_name: 'doe',
  settings: { nested_settings: { settings_prop: [{ value: 'stuff', active: true }] } },
  other_settings_props: 'config'
})

addUser()

Expected Behavior

settings_prop should have default timestamps value

[IslandRhythms]

const mongoose = require('mongoose');
const Schema = mongoose.Schema

const nestedSettingsSchema = new Schema({
  value: String,
  active: Boolean
},
{
  timestamps: true,
  _id: false
})

const userSettignsSchema = new Schema({

  nested_settings: {
    settings_prop: [nestedSettingsSchema]
  },
  other_settings_props: String
}, { _id: false })

const userSchema = new Schema({
  first_name: String,
  last_name: String,
  settings: userSettignsSchema
}, {
  timestamps: true
})

const UserTest = mongoose.model('UserTest', userSchema)

async function run() {
    await mongoose.connect('mongodb://localhost:27017');
    await mongoose.connection.dropDatabase();
    const entry = await UserTest.create({
        first_name: 'jon',
        last_name: 'doe',
        settings: { nested_settings: { settings_prop: [{ value: 'stuff', active: true }] } },
        other_settings_props: 'config'
    });
    console.log(entry.settings.nested_settings.settings_prop);

}
run();