NSS flash combo?

so I was doing some random shit and training with my kuma and at the same time I was testing some yoshimitsu combo's with my 2nd controller and I found this new combo set-up that links with flash o.o

I've never heard anything about this but it goes like this:

NSS : (CH) 2, 1+4 , random followup flash combo
2 seriously connects with 1+4...