The plot thinkens. I can only find the correct profile with skywalker, not with the official app.
Skywalker retrieves profiles of all users I follow on login. I follow the official account. My search function resolves the query locally.
Just rejected my hypothesis. Logging in with an account that does not follow, I still can find it.
I recall that the getProfile request takes a handle or did. With the handle is works perhaps.
For a mention the handle is first resolved to a did.