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If we see that history store is flushing a small amount of events (much less that the Flush Quantity which is the maximum number of tags to publish in a single message upon reestablishing communication), then the history is flushing too slowly to fully drain the History Store when new data is being inserted while in-order flushing is in progress.

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To resolve this issue, decrease the Flush Period to allow MQTT Transmission to flush all historical data and get back to publishing live data. 

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