Symptoms
According to the documentation recurring fee are expected to be taken for the susbcriptions on credit hold, however no billing orders are created for such subscriptions. Zero billing orders were generated for these subscriptions on their billing date, which can only be found in the database.
Cause
An issue is caused by the bug with id #PBA-78875 ("Billing issues of subscriptions on hold")/#PBA-78966, its clone for the issue to be fixed in OSA 7.0 updates -
Resolution
The bug is fixed since OSA 7.0.2.
The only workaround to bill the affected subscriptions is creating a debit memo for the required sum or create a manual billing order with API (CreateManualOrder_API).