This is actually really good information. I recall a few threads over on the Corvette Forums of people experiencing this phenomenon (including the relay randomly cycling) but couldn't figure out what was going on. Now you've documented the likely culprit, which is excellent. I'll have to keep that in mind on my own vehicles; though at least so far I still enter and exit from the driver's door, so I haven't experienced that issue yet personally.
I wonder if that's something that could be patched out in firmware? Make it so it'll sleep regardless of the driver's door cycling after, say, the same amount of time as the Delayed Accessory Bus timeout?
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