select_related on one2one field returns unfilled objects

Describe the bug
A clear and concise description of what the bug is.
the example models look like this

class B(Model):
      id = fields.UUIDField(pk=True)
class A(Model):
    the_b = fields.OneToOneField(
        "models.B", related_name="the_a", on_delete=fields.SET_NULL, null=True
    )

then i get it like:
a = A.all().select_related('the_b').get(id=<some_uuid>)

and got:
a.the_b is not None while a.the_b_id is None
but for some reason
a = A.all().prefetch_related('the_b')
a.the_b is None
is this intended behaviour and do you have any plans to fix it ?

Reproduce the A/B models and compare select_related('the_b') with prefetch_related('the_b'). Trace the relation-loading entry points for both paths and verify how the related object and the the_b_id value are populated. Done means the two loading strategies consistently reflect the relationship state, with regression coverage for the reported case.