What are the consequences of a failure to issue a requested statement of decision?

the entire cause, including the evidence, the court shall be of the opinion that the error complained of has resulted in a miscarriage of justice." Although in a particular case a trial court's failure to issue a requested statement of decision may amount to a structural defect in the trial mechanism that defies evaluation for harmlessness, we cannot say this type of error "fall[s] into the rare class of mistakes that are reversible per se." ( People v. Sivongxxay, supra, 3 Cal.5th 151, 180.)