While doing database maintenance, a database query was performed incorrectly, resulting in bad data being written / overwritten to subscriptions' past due amounts, and in some cases the first_failed_transaction_date value.
We are currently working to restore the data. We will post updates here as they are available.
Update 3:20pm PST: We are still working on restoring and correcting data, but all subscriptions without a first_failed_transaction_date have had their past_due_amount values reset to 0 for now.
Update 5:30pm PST: We're prepping to restore the data.
Update 7:50pm PST: All data is restored.