  We perform the Dirac quantization of RS fields interacting with a spinor and
the first derivative of a pseudoscalar field. We achieve the calculations for
two forms of this interaction: first we review the conventional coupling of
lowest derivative order, reproducing the well known inconsistencies in its
anticommutator algebra. Then, we perform the analysis on the next order term
popularly known as spin 3/2 gauge invariant interaction, which is claimed to be
free of these inconsistencies. Nevertheless we find that the direct application
of the Dirac formalism leads to inconsistencies in complete analogy to the
previous case. This is of high relevance in the particle phenomenology field,
where these interactions are used to interpret experimental data involving
Delta(1232) resonances.
