With a inheritance hierarchy A > B > C, a association referencing B and explicit discriminators enabled the generated load statement wrongfully selects the discriminator column from B instead of A.

AbstractEntityPersister.propertySelectFragmentFragment:
addDiscriminatorToSelect( select, tableAlias, suffix );

where tableAlias is the alias for the referencedEntity table that, in this constellation, does not match the root table which holds the discriminator column.