Changing print style at time of submission not working in Release 12

Hi

We are using print style as PDF Publisher A4 assigned at concurrent program defn  for AR Invoice (BI Publisher report), As there is additional requirement for some invoices file has to be copied to Specific dir for this we have defined Custom Style Print MAchine which will copy output to desired dir this will be changed during runtime. this is working in 11i(Ver 11.5.10.2) this

Where as when we try in Release 12 to change print style to Print Machine instead of PDF Publisher A4 though it's allowing to change but when request gets submitted it
shows pritn style as PDF Publisher A4  it appears it is not allowing to change print style dynamically in Release 12 instance (Ver 12.1.3)