Hi, Neon.  A larva which is about ready to be sealed comes from an
egg laid 9 days ago, not 3 days ago.  Was the queen marked?  It
sounds to me like you may have a supersedure queen in your hive.
Bees have no trouble controlling the ventilation in their hive absent
really severe conditions.  I wouldn't expect that to be causative of
anything.  Dan

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