Doctrine ORM Association creates PHP proxy class

Question

Why are Proxy classes created instead of entity objects?

DoctrineORMModule\Proxy\__CG__\App\Entity\FormType vs \App\Entity\FormType

Setup: Laminas, Doctrine ORM

    Class Project{}
    
    Class ProjectForm
    {
    /**
         * @ORM\Id
         * @ORM\Column(name="id")
         * @ORM\GeneratedValue
         */
        protected $id;
    
        /**
         * @ORM\OneToOne(targetEntity="FormType")
         * @ORM\JoinColumn(name="form_type_id", referencedColumnName="id")
         */
        protected $formType;
        
        /** 
         * @ORM\OneToOne(targetEntity="Project")
         * @ORM\JoinColumn(name="project_id", referencedColumnName="id")
         */
        protected $project;
    
        /** 
         * @ORM\Column(name="label")  
         */
        protected $label;
    
        /**
         * @ORM\Column(name="status")  
         */
        protected $status;
           
        /**
         * @ORM\Column(name="order_nr")
         */
        protected $order;
    }    
Class FormType
{/**
     * @ORM\Id
     * @ORM\Column(name="id")
     * @ORM\GeneratedValue
     */
    protected $id;
    
    /**
     * @ORM\Column(name="code")
     */
    protected $code;
    
    /**
     * @ORM\Column(name="label_txt")
     */
    protected $label;
:
:
}

Then, using a custom extended Repository use the query builder to get data from storage

 $qb->select('pc','ft')
        ->from(\App\Entity\ProjectForm::class,'pc')
        ->join(\App\Entity\FormType::class,'ft')   
        ->where($qb->expr()->eq('pc.project',$projectId))
        ->andWhere('pc.formType=ft.id');

SQL Generated is/seems correct (when passing project ID 1) and returns the correct number of rows

SELECT p0_.id AS id_0, p0_.label AS label_1, p0_.status AS status_2, p0_.order_nr AS order_nr_3, f1_.id AS id_4, f1_.code AS code_5, f1_.label_txt AS label_txt_6, p0_.form_type_id AS form_type_id_7, p0_.project_id AS project_id_8 FROM project_forms p0_ INNER JOIN form_types f1_ WHERE p0_.project_id = 1 AND p0_.form_type_id = f1_.id

The same resultset is visible via

$this->getEntityManager()->getRepository(\Eho\Core\Entity\ProjectForm::class)->findBy(['project'=>$projectId],[]);

With $result[0]->getProject()->getTitle() returning the correct string but $result[0]->getFormType()->getName() throwing and error due to class \DoctrineORMModule\Proxy\__CG__\Entity\FormType being returned from getFormType()...???

Project::getTite() -> string
ProjectForm->getName() -> string

EDIT: Also tried different join for giggles

$joinOn = \Doctrine\ORM\Query\Expr\Join::ON;
        $joinWith = \Doctrine\ORM\Query\Expr\Join::WITH;
        $qb->select('pf','ft')
        ->from(\App\Entity\ProjectForm::class,'pf')
        ->innerJoin(\App\Entity\FormType::class,'ft',$joinWith, 'pf.formType=ft.id')
        ->where($qb->expr()->eq('pf.project',$projectId));

With SQL generated:

SELECT ...fields... FROM project_forms p0_ INNER JOIN form_types f1_ ON (p0_.form_type_id = f1_.id) WHERE p0_.project_id = 1

But the same resultsets (with Proxy classes are returned)...

Why is ONE entity (project) populated correctly and another (formType) as a proxy...?