I recently pointed out that the weekly updates about additions of new records to the FamilySearch.org website have been segregated with the new images going into the Catalog and the newly indexed images going into the Historical Record Collections. It appeared that they were trying to make sure that all the records in the Historical Record Collections were indexed. However, recent notices, such as the one above for the week of August 6, 2018, send a mixed message. There is a large collection of Italian records that are images only and have apparently been added to the Historical Record Collections.
The conclusion right now is that if you want to find a record on FamilySearch.org, you need to search for records BOTH in the Historical Record Collections and in the Catalog. For a brief explanation, see the following:
Where are the Digitized Records on FamilySearch.org