3060Ti LHR needs to run seperate instances

I have 2x 3060Ti s. Because the cards are LHR locked I run them with NB miners LHR unlock however, when i use 2 cards on the same Mobo one of the cards (seemingly random) completely turn off(?) just as the miner starts. I tried them on seperate pcs and both work stable seperately.

I’ve seem to have find a workaround by running two seperate miners which solves the problem however no other miner has the LHR bypass that NBminer has.

Finally my actual question : how can i run 2 seperate instances of NBminer on the same flightsheet?

any help is appreciated.

bump sry