This is a known bug. It does not have a separate bugs topic, but it’s part of the same problem included in a bug report under a different title. See this topic for a discussion: Recurring Payslips Auto Reference Number Not Generated.
This is a known bug. It does not have a separate bugs topic, but it’s part of the same problem included in a bug report under a different title. See this topic for a discussion: Recurring Payslips Auto Reference Number Not Generated.