Explicit change tracking not inherited by inheriting classes

I have a class B that inherits from A using single table inheritance strategy with discriminator column.
On class A I have defined @ChangeTrackingPolicy ("DEFERRED_EXPLICIT"), which should be inherited by B, but it is not currenlty.

This means that when I have a managed instance $b of B $em->getClassMetadata(get_class($b))->isChangeTrackingDeferredExplicit()
does not return TRUE and calling $em->persist($b) and $em->flush() does not save any changes to $b.

If I set @ChangeTrackingPolicy ("DEFERRED_EXPLICIT") on class B it does work. So either way I think B should inherit the change tracking policy of A, or it should have IMPLICT as default like A but not none.