short namespace in targetEntity dont work

in 2.1.x this work

/**

• @ManyToOne(targetEntity="\Db:Cliente", cascade= {"ALL"})
  * @JoinColumn(name="cliente", referencedColumnName="telefono", nullable=false)
  * @var Db\modelo\Cliente
  */
  
  in 2.2 crash!
  
  PHP Fatal error: Uncaught exception 'Doctrine\\ORM\\Mapping
  MappingException' with message 'The target-entity Db:Cliente cannot be found in 'Lanzadora\\modelo
  Servicios#cliente'.' ....
  
  to use 2.2, i need update all Entities to this:
  
  /**
  * @ManyToOne(targetEntity="\Db\modelo\Cliente", cascade={"ALL"}

  )

• @JoinColumn(name="cliente", referencedColumnName="telefono", nullable=false)
• @var Db\modelo\Cliente
  */

why it change?, is bug or planned?

see DDC-1585 !!!