Madza - lost of power when fuel tank below half

Hello,

I notice last summer something strange about my car. I own a Mazda 626
Cronos 1994 4 cyl. auto.

When the gaz tank is half full or less and that I take a rapid turn ( like
a highway ramp at important speed ( above 60 km/h ) my RPM just fall down
and it seems like there is no more fuel going to the engine. The engine
didn't stall but it came close each time it happen. When this is happing,
the car loose speed and it seem the centrifugal force, being less
important, the fuel return back to the engine and the power came back
again. If the fuel tank is full or above the half level, it never did
that. I replace the fuel filter, thinking it could be the problem, but
the problem still happen ( seem to happen less often though ) Can it be
the fuel pump ou something loosen in the fuel tank ? What are you
thinking of that ? Thanks for your help and opinion. Chrysof that ?
Thanks for your help and opinion. Chrys