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

The issues with subscriptions disappearing was resolved by a fix Microsoft deployed to the web environment. However we see continuing issues where on any given day some users will receive their updates and others will not. Strangely enough, a user may not receive a report for several days in a row, then without any action on their part their subscription emails start being delivered again.

No clear pattern, but it's definitely something in the Power BI web service rather than reports being caught in organizational or individual spam filters.