so i went out and poked through the foam. looks/feels like a seam either way i was able to take a screw driver insert it handle first then get the whole thing in the hole there and then poked around till i found a soft spot at the seam, that area is right under where the clip hole is to hold the kick panel on, pushed through gave it a wiggle and pulled it back out.
inside that hole was wet, all the seam foam inside there was super moist still. this might have been the fix.
its rained here before since i got the truck and ive not seen this before. but a few days back it poured, like really hard for 2 days. the day after i found it wet.
fingers crossed. maybe this is the OP'S issue too but on both sides.