Cyberlights not dousing when shutdown

Any ideas what I could do to fix some CL's I have that won't douse the lamp? It seems I send the shutdown command, and most of mine will go out, but 3 of them seem to hang on (though they will not respond to DMX after the shutdown command has been sent). The lamps will remain on until I totally kill power to my desk, in which they will douse automatically after 5 or 10 minutes.

:headbang:
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