Synchronize assets added to the subfolder of a collection

When a collection with asset and sub folders are in sync with local Nuxeo drive and user try to add the new assets to one of the sub folder of a collection but newly added assets are not sync in local Nuxeo drive folder.

Steps To Reproduce:
1. Open Nuxeo drive in local
2. Open the Nuxeo web ui and login
3. Navigate to the personal workspace
4. Create a collection which has a sub folder and some assets
5. Enable the synchronization for the collection
6. Navigate to the sub folder in the collection and some new assets
7. Verify the sync in local Nuxeo drive for sub folder

Results:

Actual Result:
The Sub folder inside the collection not synchronizing newly added assets.

Expected Result:
The Sub folder inside the collection should synchronize newly added assets and it should be same as Web UI