Hi Bill,
Thanks for contacting Syncfusion support.
We are able to reproduce the reported problem at our end. We have confirmed it as a bug and logged the defect report “groupCaptionTemplate is not rendered while binding this template through groupSettings.captionTemplate in Vue”. Thank you for taking the time to report this issue and helping us improve our product. At Syncfusion, we are committed to fixing all validated defects (subject to technological feasibility and Product Development Life Cycle ) and including the defect fix in our upcoming weekly release which is expected to be rolled out on 11th November, 2020.
You can now track the current status of your request, review the proposed resolution timeline, and contact us for any further inquiries through this link.
Until then we appreciate your patience.
Regards,
Balaji Sekar