Squeaking in Back of Forester

Hello Everyone,

So I have a question.

We had bought a bunch of Retaining Wall Blocks from Lowes which I put in the back of the Forester to hall from the store to home.

Made multiple trips from the store to home.

Now there seems to be a squeaking sound coming from the back of the Forester.

At first I thought the foam had been misaligned and was rubbing against each other under the top cover.

I removed the foam and the top cover and the sound was still there.

I made sure everything is installed correctly but the sound is still there.

Sounds like foam rubbing up against other foam.

It's really annoying.

I am starting to the think something got tweaked by the weight of the stones.

They were about 4 x 12 inch block stones but we only carried maybe 20 at a time ( 1 stone is heavy of course, around 22lbs each).

Anyway, wanted to see if anyone has ever experienced anything like this after hauling something heavy?

I figured the Forester should be able to handle up to 400 to 500 lbs of load at a time (I figured about 20 stones at 22lbs each would be between 400 to 500lbs).

Any feedback would be greatly appreciated.