Nuget Virtual does not list all the packages through the Search

Steps to reproduce is when we use the search API as below:

'http://ArtURL:8081/artifactory/api/nuget/nuget-local/Search()?$filter=IsLatetVersion&searchTerm=%27%27&targetFramework=%27%27&includePrerelease=false&$skip=0&$top=40'

The local lists all the packages container.

However, if we run the same search API against the virtual only 1 package is getting listed. 

curl 'http://ArtURL:8081/artifactory/api/nuget/nuget/Search()?$filter=IsLatestVersion&searchTerm=%27%27&targetFramework=%27%27&includePrerelease=false&$skip=0&$top=40'

Reproduced on 6.12 version of artifactory as well.