you didn't mention any noise in bridge position...is the bridge a humbucker or hum cancelling?
Do you have noiseless pickups or standard/true single coils? If single coils, does the noise change as you move closer to or away from devices like computer monitors which produce RF interference? That's normal. If not, you might have a grounding problem--does it change depending on whether you are touching the strings or a control on the pickguard?
If by "electrical feedback noise" you mean hum and electrical interference, that's normal for a strat in these positions. If you want to keep your pickups, the only solution is more distance between your guitar and the intereference sources (usually musical equipment). Also, you should be able to find a pointg of lowest interference by facing the guitar in different directions.
you didn't mention any noise in bridge position...is the bridge a humbucker or hum cancelling?
Can you also describe the noise? Hum? buzz? hiss? etc etc? Or record it?
with strats, or both mine anyway, this is normal.
...and usually no noise in the 1st position is normal also.
however it usually only occurred at home while sitting very close to other
electrical equipment. never was a problem on stage.
good luck