Clarification Request: Recent Change in Editing Access for Older API-Generated Presentations

We have also noticed that older presentations previously generated via the API now require the user to be logged into Gamma in order to edit them. We are not claiming with certainty that it was different before, but based on our workflow and tests, this appears to be a recent change. When accessing those older editable links in incognito mode (without logging in), editing is no longer possible. Could you please clarify whether this behavior is the result of a recent update, or if this was always the intended functionality?