Why wixData.bulkSave returns incorrect statistics?

UPDATE: As this seemed to be a “bug”, I also reported it to Wix Customer Support. They were very responsive (as always in my experience) and proceeded to confirm the behavior and forward the issue to the development team. The bug has now been corrected!

In testing collection updates/inserts using wixData.bulkSave, I am seeing errors in the built-in statistics reports for inserted and updated IDs using this grammar:

let insertedIds = results . insertedItemIds ;
let updatedIds = results . updatedItemIds ;

The bulkSave is functioning properly, but the built-in reports are identifying the wrong ItemIds that are inserted vs updated. The reported number of items inserted is correct, but the IDs reported are wrong (real IDs of items being saved, but not the IDs of the items actually inserted vs updated ).

Since these are built-in functions of the bulkSave, I don’t know what I could be doing that would cause incorrect information to be reported, while the actual inserts and updates are correct in the collection. Does anyone have insights about this behavior?

Thank you!