Hi Brice,
Greetings from Syncfusion.
We have checked the reported problem and we are able to reproduce the reported at our end too. We have confirmed it is a bug and logged(added this case in this feedback) the defect report “edited values are not saved if the primary key value is GUID”. 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 patch release which is expected to be rolled out on or before mid of August 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.
Till then we appreciate your patience.
Regards,
Rahul