Just to eliminate the possibility I would take the spare out. The spare sits on that foam/rubbery material and that material could be rubbing against something because if it is that will make a terrible squeaking sound.
And that’s located in the exact area you mention so if someone puts weight on that area it’s going to hold the tire and the foam
In place, which would be why the noise stopped when the person was back there
And that’s located in the exact area you mention so if someone puts weight on that area it’s going to hold the tire and the foam
In place, which would be why the noise stopped when the person was back there