MessageListenerException throws when adding a comment on production for a content with comment

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Publications
• Labels: None
• Fix Priority: 3
• Git Pull Request: https://github.com/Preston-Crary/liferay-portal/pull/1436

Steps to reproduce

1. Enable publications
2. Add a new publication "P1"
3. Add a new document
4. Add a page with Documents and Media widget
5. Add a new comment for the document
6. Publish the publication
7. Work on production, add another comment for document

Actual Result:
the comment can be added but the following error throws

021-07-16 04:16:12.185 ERROR [liferay/subscription_sender-3][ParallelDestination:59] Unable to process message {destinationName=liferay/subscription_sender, response=null, responseDestinationName=null, responseId=null, payload={}, values={defaultLocale=en_US, companyId=20100, groupId=0, principalName=20129, [email protected]1b08c389, siteDefaultLocale=en_US, themeDisplayLocale=en_US}}
com.liferay.portal.kernel.messaging.MessageListenerException: java.lang.ClassCastException: java.util.HashMap cannot be cast to com.liferay.portal.kernel.util.SubscriptionSender
	at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:41) ~[portal-kernel.jar:?]
	at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74) ~[portal-kernel.jar:?]
	at com.liferay.portal.messaging.internal.ParallelDestination$1.run(ParallelDestination.java:56) [bundleFile:?]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_291]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_291]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_291]
Caused by: java.lang.ClassCastException: java.util.HashMap cannot be cast to com.liferay.portal.kernel.util.SubscriptionSender
	at com.liferay.subscription.internal.messaging.SubscriptionSenderMessageListener.doReceive(SubscriptionSenderMessageListener.java:44) ~[?:?]
	at com.liferay.portal.kernel.messaging.BaseMessageListener.doReceive(BaseMessageListener.java:48) ~[portal-kernel.jar:?]
	at com.liferay.portal.kernel.messaging.BaseMessageListener.receive(BaseMessageListener.java:34) ~[portal-kernel.jar:?]
	... 5 more