Airbag warning light - Passenger seat

[ADU UR quattro]

I fitted my resistor over a year ago, its been great, but the airbag light has returned.After further investigation it appears if the passenger heated seat is on, on "6" after a long period the airbag light came on again, ( remember I fitted the resistor to my car its been through 2 MOT s ) if the seat heater is turned down to "5" the airbag light goes out again, and vagcom shows the seat as being occupied, so all is good, no need to connect to vagcom to reset the light. Just thought I would make you all aware of my experience.