You can submit a case with Zuora Support using the bug report below.
Title: [Bug] - <A short description of the bug. It should be a few words or a short sentence>
Summary: A brief summary of the bug mostly in 60 words or below. Make sure your summary is reflecting what the problem is and where it is.
Description: A detailed description of the bug. Use following fields for description field:
URL: The page URL on which bug occurred
Product: In which product you found this bug
Version: The product version if any
Component: These are the major sub modules of the product
Platform: Mention the hardware platform where you found this bug. The various platforms like PC or MAC, etc.
Operating system: Mention all the operating systems where you found the bug. Operating systems like Windows or Mac OS. Mention the different OS versions also if applicable like Windows 7, Windows 10, MacOS Sierra Version 10.12.5, etc.
Priority: When should the bug be fixed? Priority is generally set from P1 to P5. P1 as fix the bug with highest priority and P5 as Fix when time permits.
Severity: This describes the impact of the bug. Types of Severity:
If your bug report is effective, it would be easier for Zuora Support / Engineering to identify the issue and fix it.