This was mentioned in this comment:

Pel que he observat (però és que no sempre és igual), té tendència a repetir tot el text de la referència quan només hi hauria de fer una menció.

Which translates into English roughly as:

From my observations (not consistently repeated), the whole text of the reference tends to be repeated when it should just make a mention.

With the latest code, it is not possible to have different content for references with same name:

Editing one will cause the same changes propagated to the second. Because of this the issue that shows red color error about "multiple times with different content" was not able to reproduce to me. The published content looked like as follows:

But the issue of reference content repeated in wikitext remains.
@Esanders is there a way we can reconcile the reference content so that before publishing reference body is only in one reference and others are just reference by name?

I think when importing new content to the page you could check any references against the internal list for conflicting keys (ve.dm.InternalList). I don't think we've solved this problem before so it could be quite fiddly to fix, as most things to do with references are...