interestingly enough, i had the same issue with my AK last time I went out using what looks like old metal mags. Not sure of the make. The springs seemed a little soft and when feeding the magazine, the rounds would shift such that I would have to reposition them to stay in the correct double stack orientation.
I was using standard wolf/tul/brown bear stuff (not sure which one i was using at the same).
needless to say, when i went to tapco (yea....tapco) and circle 10 mags, i had no feeding issues.
those two mags are now out of commission (i might try it again to see if i can recreate the issue) and I will stick with tapco/circle10/bulgarian steel mags that are blocked OR arsenal/tapco 10rd mags.