Yes and Yes Itried flying it at a local park the next day and this time I got a signal that said something about "magnetic interference or metal" and I still got the same "stronge interference detected"I'm assuming you mean "strong interference detected".
Where exactly are you flying? Did you try flying elsewhere in a location that does not have any potential interference (e.g. houses with Wi-Fi)?
That happened to me went to 200 then it said lost signal, dropped to 197 then it pick up again. And I was in the middle of sports fields , there is over head wires around though.I just got my P3 3 days ago and every time I fly I get a "sting interference detected" warning and I tried flying high and I lose signal at about 200ft high