Monitoring plugin - Storing message delivery receipts

Openfire Plugins I have openfire 4.0.1 and monitoring plugin 1.5.1. This is related to XEP-0184. I’m able to get delivery receipts as long as the user is online, but once the messages gets loaded from archives the receipts disappear. I checked the stanza in the archives, while the request part gets stored along with the message, the receipts are not stored. I’m not sure whether this is due to the acknowledgment, while the protocol doesn’t allow sending acknowledgements for archived messages, it does not restrict storing the receipt. I’m not sure if this is from the server side, but it would be grateful if you can check the issue. Thanks you.