pmdg 737 Lights

I am hoping that someone could help me with this problem and that is when I do my night flights with the 737-800WL version I turn on the Taxi Light so i can taxi to the runway the Runway Turnoff lights come on automatically and it deoesnt matter if i use the RW turnoff switch in the overhead the RW turnoff lights stay on no matter what the RW switch is on so i would like to know if this is a bug or are the RW Turnoff lights hardcoded with the taxi light. Any help would be gladley appreciated,