Contain only works when specifying either one of required models - php

Question

If I add two models in contain, at the same time, only one property will be populated. If I add either one separately, the corresponding property will be populated fine. I suspect a clash with the users table somehow.
Basics:
task lead: tasks hasOne organizational_units hasOne users
tasks [id, organizational_unit_id, ...] > organizational_units [id, user_id, ...] > users [id, ...]
task collaborators: tasks hasAndBelongsToMany users (tasks_users)
tasks [id, ...] > tasks_users [task_id, user_id] > users [id, ...]
Code:
//populates $task->organizational_unit property
$this->Tasks->find()->contain(['OrganizationalUnits.Users'])->where(['Tasks.id' => $id]);
//populates $task->users property
$this->Tasks->find()->contain(['Users'])->where(['Tasks.id' => $id]);
//only populates organizational_unit property, missing users property
$this->Tasks->find()->contain(['OrganizationalUnits.Users','Users'])->where(['Tasks.id' => $id]);
Task Table:
<?php
declare(strict_types=1);
namespace App\Model\Table;
use Cake\ORM\Query;
use Cake\ORM\RulesChecker;
use Cake\ORM\Table;
use Cake\Validation\Validator;
/**
* Tasks Model
*
* #property \App\Model\Table\TasksTable&\Cake\ORM\Association\BelongsTo $ParentTasks
* #property \App\Model\Table\OrganizationalUnitsTable&\Cake\ORM\Association\BelongsTo $OrganizationalUnits
* #property \App\Model\Table\FiscalYearsTable&\Cake\ORM\Association\BelongsTo $FiscalYears
* #property \App\Model\Table\TaskStatusesTable&\Cake\ORM\Association\BelongsTo $TaskStatuses
* #property \App\Model\Table\QuartersTable&\Cake\ORM\Association\BelongsTo $Quarters
* #property \App\Model\Table\TaskTypesTable&\Cake\ORM\Association\BelongsTo $TaskTypes
* #property \App\Model\Table\TaskPrioritiesTable&\Cake\ORM\Association\BelongsTo $TaskPriorities
* #property \App\Model\Table\TaskDiscussionNotesTable&\Cake\ORM\Association\HasMany $TaskDiscussionNotes
* #property \App\Model\Table\TaskOutcomesTable&\Cake\ORM\Association\HasMany $TaskOutcomes
* #property \App\Model\Table\TasksTable&\Cake\ORM\Association\HasMany $ChildTasks
* #property \App\Model\Table\UsersTable&\Cake\ORM\Association\BelongsToMany $Users
*
* #method \App\Model\Entity\Task newEmptyEntity()
* #method \App\Model\Entity\Task newEntity(array $data, array $options = [])
* #method \App\Model\Entity\Task[] newEntities(array $data, array $options = [])
* #method \App\Model\Entity\Task get($primaryKey, $options = [])
* #method \App\Model\Entity\Task findOrCreate($search, ?callable $callback = null, $options = [])
* #method \App\Model\Entity\Task patchEntity(\Cake\Datasource\EntityInterface $entity, array $data, array $options = [])
* #method \App\Model\Entity\Task[] patchEntities(iterable $entities, array $data, array $options = [])
* #method \App\Model\Entity\Task|false save(\Cake\Datasource\EntityInterface $entity, $options = [])
* #method \App\Model\Entity\Task saveOrFail(\Cake\Datasource\EntityInterface $entity, $options = [])
* #method \App\Model\Entity\Task[]|\Cake\Datasource\ResultSetInterface|false saveMany(iterable $entities, $options = [])
* #method \App\Model\Entity\Task[]|\Cake\Datasource\ResultSetInterface saveManyOrFail(iterable $entities, $options = [])
* #method \App\Model\Entity\Task[]|\Cake\Datasource\ResultSetInterface|false deleteMany(iterable $entities, $options = [])
* #method \App\Model\Entity\Task[]|\Cake\Datasource\ResultSetInterface deleteManyOrFail(iterable $entities, $options = [])
*
* #mixin \Cake\ORM\Behavior\TimestampBehavior
* #mixin \Cake\ORM\Behavior\TreeBehavior
*/
class TasksTable extends Table
{
/**
* Initialize method
*
* #param array $config The configuration for the Table.
* #return void
*/
public function initialize(array $config): void
{
parent::initialize($config);
$this->setTable('tasks');
$this->setDisplayField('name');
$this->setPrimaryKey('id');
$this->addBehavior('Tree', [
'level' => 'level', // Defaults to null, i.e. no level saving
]);
$this->belongsTo('ParentTasks', [
'className' => 'Tasks',
'foreignKey' => 'parent_id',
]);
$this->belongsTo('OrganizationalUnits', [
'foreignKey' => 'organizational_unit_id',
'joinType' => 'INNER',
]);
$this->belongsTo('FiscalYears', [
'foreignKey' => 'fiscal_year_id',
'joinType' => 'INNER',
]);
$this->belongsTo('TaskStatuses', [
'foreignKey' => 'task_status_id',
]);
$this->belongsTo('Quarters', [
'foreignKey' => 'quarter_id',
]);
$this->belongsTo('TaskTypes', [
'foreignKey' => 'task_type_id',
'joinType' => 'INNER',
]);
$this->belongsTo('TaskPriorities', [
'foreignKey' => 'task_priority_id',
'joinType' => 'INNER',
]);
$this->hasMany('TaskDiscussionNotes', [
'foreignKey' => 'task_id',
]);
$this->hasMany('TaskOutcomes', [
'foreignKey' => 'task_id',
]);
$this->hasMany('ChildTasks', [
'className' => 'Tasks',
'foreignKey' => 'parent_id',
]);
$this->belongsToMany('Users', [
'foreignKey' => 'task_id',
'targetForeignKey' => 'user_id',
'joinTable' => 'tasks_users',
]);
}
/**
* Default validation rules.
*
* #param \Cake\Validation\Validator $validator Validator instance.
* #return \Cake\Validation\Validator
*/
public function validationDefault(Validator $validator): \Cake\Validation\Validator
{
//removed
return $validator;
}
/**
* Returns a rules checker object that will be used for validating
* application integrity.
*
* #param \Cake\ORM\RulesChecker $rules The rules object to be modified.
* #return \Cake\ORM\RulesChecker
*/
public function buildRules(RulesChecker $rules): \Cake\ORM\RulesChecker
{
//removed
return $rules;
}
}