Some LED balasts are defective and operate from background current that may be leaking from all live wiring that is connected to “soft” disconnects like dimmers.
In our house we have dozens of identical LED can lights, but two of them glow slightly when off on a dimmer circuit (different circuits) while others on the same circuits are dark. Another glows when other circuits in the same room are on, and one takes 3-4 minutes to go completely dark when you turn it off.
So different people may have different results from the same bulb in the same car model.The quintessential YMMV situation.