Translate mongo nested array query into mongoose - node.js

Question

I have the following query working with mongo, it returns the expected result
db.getCollection('trainings').find({"sections.employees.employee":ObjectId("5d3afa1a58a7160ea451d1db")})
but when I try the following call with mongoose, it returns an empty array
Training.find({'section.employees.employee': "5d3afa1a58a7160ea451d1db"})
Need some helping to translate the mongo query to mongoose.
If you need anything else just add a comment and I will post here.
It's worth mentioning that I have already tried passing a new ObjectId with the String value, but it also returns an empty array.
Edit: Query usage
return await Training.find({'section.employees.employee': "5d3afa1a58a7160ea451d1db"})
Edit: Model
const mongoose = require("mongoose");
const Schema = mongoose.Schema;
const EmployeeSection = new Schema({
employee: {type: Schema.Types.ObjectId, ref: 'Employee', required: true},
fulfilled: {type: Boolean, default: null},
});
const Section = new Schema({
order: {type: Number, required: true},
date: {type: Date},
employees: {type: [EmployeeSection]},
answers: {type: Number},
hits: {type: Number}
});
const GoalSchema = new Schema({
understanding: {type: Number, required: true},
fixation: {type: Number, required: true}
});
const Evidence = new Schema({
description: {type: String, required: true},
file: {type: String}
});
const Question = new Schema({
participants: {type: Number},
answers: {type: Number},
hits: {type: Number}
});
const TrainingSchema = new Schema({
company: {type: Schema.Types.ObjectId, ref: 'Company', required: true, index: true},
creationDate: { type: Date, default: Date.now },
title: {type: String},
obs: {type: String},
questionNumber: {type: Number},
reference: {type: String},
sections: {type: [Section]},
goals: {
answers: {type: GoalSchema, required: true},
hits: {type: GoalSchema, required: true}
},
evidences: {type: [Evidence]},
questions: {type: [Question]},
area: {type: Schema.Types.ObjectId, ref: 'TrainingArea', required: true},
});
const Training = mongoose.model('Training', TrainingSchema);
module.exports = Training;
I am willing to change the Model schema, if the problem really lays there, but didn't really want to do it.

Answer 1

Why its always a typo?
db.getCollection('trainings').find({"sections.employees.employee":ObjectId("5d3afa1a58a7160ea451d1db")})
Training.find({'section.employees.employee': "5d3afa1a58a7160ea451d1db"})
Forgot s on sections

Answer 2

Made the problem a bit easier for me.
const mongoose = require("mongoose");
mongoose.connect("mongodb://localhost/training", { useNewUrlParser: true })
const util = require("util")
const Schema = mongoose.Schema;
const EmployeeSection = new Schema({
employee: {type: Schema.Types.ObjectId, ref: 'Employee', required: true}
});
const Section = new Schema({
employees: {type: [EmployeeSection]}
});
const TrainingSchema = new Schema({
sections: {type: [Section]}
});
const Training = mongoose.model('Training', TrainingSchema);
Training.find(
{
"sections.employees.employee": mongoose.Types.ObjectId("5d3afa1a58a7160ea451d1db")
})
.exec()
.then(result => {
console.log(util.inspect(result, false, null, true /* enable colors */))
}).catch(err =>{
console.log(err)
})