Is there a bug in my wall/outlet?

I have an outlet in my apartment that never worked and it’s the only outlet facing upside down.

I bought a detector recently. Turned off my phone and laptop, put them by the front door. Got some base reads in my room and swept my room. The alarm box, fan & light, circuit breaker, the rest of the outlets. Waited till traffic died down by my window I was only getting maybe up to two or three on the wand. I was getting higher reads on my bed. I checked under the bed I didn't see anything. I swept around the walls and floors. I get to that outlet that never worked and the wand sounded. I took off the faceplate of that outlet and another outlet that didn’t have a level. The non-working outlet has a larger space behind it than the other. I turned off the circuit to my room and it still has a strong reading. When a helicopter just flew overhead it was fluctuating again.
I turned on my cellphone and walked passed it with the wand I was only getting a mid read. I only got a high read on my phone when I was scrolling. I also put it in the cabinet and still only got a mid read.

Is there any other reason why the outlet and piece of wall might be giving me high reads?

Is there a bug in my wall/outlet?
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