No. This is a duplicate of T52474: In VisualEditor, references in templates cannot be reused and are numbered separately from references in the text..

Related - perhaps, but not a duplicate. I don't see any problems with the numbering (which is what the other issue is about), sfn-style refs do not appear in re-use menu anyway, so no, this is not a duplicate.

What I'm pointing at is that sfn-style templates should be correctly shown in-line by the VE, but apparently VE adds both the call and the anchor one right next to each other and this causes the entire code to get messy (empty lines). Compare sfn template from my example above with how well a {{fact}} or {{weasel-inline}} look on English Wikipedia.

To re-create the behaviour:

1. Add a reference template (such as cite book or cite news) with the parameter ref=harv somewhere. Say, {{Citation|last = Aaardvark|first = John|title = Short title | publication-date = 2012-01-27|ref = harv}}, (use VE, obviously)
2. Add a corresponding sfn template (say, {{sfn|Aardvark|2012|p=123}}, but using VE) somewhere in the body of the article.
3. Voila!