Conversion from parameter to object not working as intended in Symfony 6.3

[JesusRedGar]

The following code doesn't work as intended:

 #[Route('/{id}', name: 'inicio')]
 #[Breadcrumb(title: "{convocatoria}" , routeName:'concursotraslados_inicio', routeParameters: ['id' => '{id}'])]
 public function inicio(Convocatoria $convocatoria) : Response
    {

Instead of showing __tostring of the object "convocatoria" it renders as "{convocatoria}" (literal), here is a image:

In the documentation, @ParamConverter is referenced. But that is deprecated and I undestand it shouldn't be used.

Is there an alternative way to do this?

[rvanlaak]

Can you try making a repo with the minimum amount of code that reproduces this issue? This bundle is considered feature-ready, so based on the info you provided above it is hard to find out what is going on.