Symptoms
Assume that you have a peer-to-peer replication setup that includes one or more peers on a non-default port. Then, you follow the steps in the following Microsoft Learn article to add an article to an existing peer-to-peer publication:
Administer a Peer-to-Peer topology (Replication SP) - SQL Server | Microsoft Learn
In this situation, you notice that the changes to newly added articles are not replicated because the replication stored procedures for newly added articles are missing on the subscriber server.
Resolution
This problem is fixed in the following cumulative update for SQL Server:
Cumulative Update 18 for SQL Server 2019
Each new cumulative update for SQL Server contains all the hotfixes and security fixes that were in the previous build. We recommend that you install the latest build for your version of SQL Server:
Status
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
References
Learn about the terminology that Microsoft uses to describe software updates.