1903A3 feed and eject issues

I have fired about 400 rounds or so through this rifle mostly trouble free. The majority of that was de-linked non-corrosive Korean surplus. During the last 30 or so rounds it began leaving the empty in the action although it would pop free of the extractor. The more briskly I operated it the more it happened. Too slow and the same. The ejector is there and looks fine but it flops around. I think that is the way it is supposed to be but can't remember if it had spring tension before.
Also, most of the time the bolt will override the cartridge and fail to feed. That may be a sticking or obstructed follower which should be easy to fix.

Sound familiar to anyone?

Everything looks fine and seems to be operating normally. I always shoot it with the magazine "on" where it locks the bolt when empty. If it was "off" it would never feed from the mag.

The rifle is a build purchased through AIM Surplus. I have put it into a Minelli "C" stock. The rifle has been working fine though. I'll have to look closer.