Replaced factory cluster w aftermarket. Turn signal issues

When turn indicators come on with park lamps the fault is supposed to be lack of chassis ground out at the front park turn fixtures. Park circuit back feeds through the turn elements of those 1157 bulbs.
Can't happen through rear fixtures because turn signal switch interrupts the turn path from those fixtures for brake lights. Anyway...
I don't know of a way that something wired wrong inside the car can cause this condition but I aint seen it all. Good luck with it.