Symptoms
The subscription of billing type "After Billing Period" was renewed in the middle of month, or the plan price was changed in the middle of the month. Billing order is generated as configured, on the 1st day of the next month but it has two order lines:
Cause
The change was introduced by feature #PBA-72859("[M7.0] Change Tariff to support ABP billing") and this behaviour is supposed to be resolved as soon as the feature #PFR-788 " Merge Order Details for subscriptions on ABP Plan" is implemented. The current behavious is going to be described in the documentation in scope of #PBA-79775 ("Multiple Bill lines generated").