No, there’s no synchronization lag in the Asana API.
I’m not familiar with the Python SDK so I’m not sure the reason for using find_by_workspace but you may be seeing another oddity of tags: an empty tag - one not associated with a task - will not be surfaced in the API:
from
You’ll need to:
Create the tag in the API and that should return its gid.
Use that returned gid to attach the tag to a task.
At that point the new tag should be fully visible in both the UI and the API.