Email subscriptions not working after report update - showing as "Draft"

Here is the scope of the problem under investigation, as reported to Microsoft. Note I have a Power BI Pro license and the users subscribing to the report also have Power BI Pro licenses.

1. Using Power BI desktop, I created a new Power BI report with one page that used a table saved inside Power BI as the only data source. There was one visual on that page.
2. I published that Power BI report to Power BI workspace and shared with selected users.
3. I viewed the report in the Power BI service and subscribed to it. Other users also subscribed to the report.  
4. I returned to Power BI desktop and edited the report page to add a new visual (pie chart).
5. I published the updated report to the Power BI workspace. When I viewed the updated report in the Power BI service, and then checked my settings, my subscription had disappeared. The same was true for users subscribing to the report.

We’ve already ruled out the obvious ideas—this doesn’t have anything to do with whether or not the report is on a scheduled refresh, or uses the Oracle data gateway. The report page was not renamed, and we did not add or delete pages in the report.

Existing subscriptions work fine for this same set of users. It is only when a report is updated that the subscriptions disappear.

It’s not a question of user access, since users are able to subscribe to the report.