Patch 20.3 was rolled out to the game worlds in September last year.
https://forums.ea.com/en/commandandconquer/discussion/263179/20-3-maintenance-patch-notes-sep-21-sep-23-update
Is that the recent patch you indicate?
My comment was a point of view for you to review in case it was an accident like mine. I've been playing this game for a long time too, and I still make inexpensive mistakes.
If they're defensive guards and you haven't attacked, some of them could have those extra 12 hours, have you checked?
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