MetaSound Sources containing a reference to a MetaSound asset changes names if the referenced MetaSound asset is duplicated. This only happens every time the original MetaSound asset is duplicate. It does not happen if duplicate is duplicated.
The reference retains the name "Original" and the asset it references
The reference changes its name to the duplicate's name.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-144864 in the post.