smart key light stays on if door opened and shut

I'm troubled by this new development in my hacked-up 2006.

When running, if a door is opened and closed the security indicator comes on and stays on unless i dock the key into the dashboard. It's not the battery, nor is it interference. It's something very frustrating because my habit is to leave the key deep in my pocket.

Any ideas? I've tapped into almost every analog signalling path and the digital signals for mfd and gps, but none of my changes touched the immobilizer circuits directly. I have a keyfob built into the onboard pc which can be enabled or disabled by bluetooth or text message, but enabling it during the problem also doesn't help.

Thanks,

~ dan ~