Auto number fields get incremented unwantedly without the record getting persisted to database.

While trying to create a new record for a custom object through a section list page button, the auto number field for the record gets incremented every time the new form page is loaded.

Similarly, if I switch to expanded view from compact view as well this happens.

Is this an expected behavior. Is there anything that could be done to make sure that the auto number increments only when the record is saved to database and not every time the page loads.