KMC Z7 chain for 8 speed cassete

Can I use KMC Z7 chaing (1/2 x 3/32) on 8 speed cassete Sunrace MFM-56?

When I changed the old chain with KMC Z7, the smallest sprocket and the largest are fine.

But in the between the shifting is not smooth and something feels not right (slipping/ skiping). NOTE: chain and cassete are both new.

Below are picture of KMC Z7 and Sunrace MFM-56.

P.S. There is also Z8 chain on KMC website. But it seems to me, that it absolutely the same size (1/2 x 3/32, pin=7.3mm).

UPDATE:

I tried a new KMC Z8 chain with width of 7.1mm.
But it didn’t provide a significant improvement.
Maybe there is something wrong with a cassete ( a fake one?).