Haptic not working when Voice enabled

I know this has been asked a few times before but searching through the various posts I haven't actually found an actual answer.

I have recently done the voice mod to my RadioMaster TX8 which works fine but I have noticed that the haptic stops working when voice volume is above 0

Is there a fix to allow voice and haptic work work together ? It would be nice to have voice for certain alerts and haptic for others.

Thanks