.npm metadata folder should not be replicated as part of Artifactory's replication.
The causes the target instance to have wrong tarball URLs - which remain in the original Artifactory instance with it's URL. See screenshots attached - observe the source with the correct URL and target with the URL of the source.
- Take into consideration the fact that the URL generated in the package.json will be consisted with the Base URL defined for Artifactory
Delete .npm in the target, trigger reindex and wait for this to be calculated correctly.
This also takes affect as part of MC's DR.