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Sounds like your wiring to the PSE is crossed, touching or contaminated. As Zulfigar mentions above, the symptom you describe is normally the effect of holding your smart key's unlock button to send an Infrared signal to sensor on driver or passenger front door handle that triggers opening of all windows and sunroof (ventilated seats turned on in equipped models). Since this happens when you close the door I would follow the door switch to the PSE and check for wires touching, check IR sensor and follow it to PSE looking for a contact with IR switch wiring. Sometimes moisture under the backseat can cause problems in the circuit board. If your backseat did have a moisture issue, you could find a CAN or PSE in the junkyard that is dry see if it might fix the issue?
Hope this is helpful.
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