Problem with a Beretta Nano

I just shot my Beretta Nano for the first time today and experienced three malfunctions of the same type.

On the next to the last round in the magazine the fired case was not extracted from the chamber. Instead the nose of the last round was firmly pressed against the rear of the fired case in the chamber of the barrel.

What I suspect happened is that after chambering the next to the last round the last round in the magazine somehow became oriented pointed upward as the slide started to retract from the barrel and the nose of the last round prevented the case from being extracted from the barrel. That would also mean that the extractor slipped over the rim of the fired case.

Has anyone heard of this type of malfunction before and if so and ideas as to what I should do?

Just read some reports that using cheap Wally World ammo may be the cause of my problems. I was shooting Federal 115 grain FMJ from Wally World.

Thanks

JJ

Update

Well I cleaned my Nano for the first time and noticed something.

Without the mag in the mag well the slide was not going all the way into battery unless I let slam a little. I then noticed that the, I don't know what to call it, the piece that turns so you can take the slide off. Has a big slot on the right hand side. Well, it was sticking out about 1/16". After pushing it back in with a soft hammer the slide closes well every time.

I will have to check this out the next time I shoot it. That may have been part of the problem.