Hi Fabrice Guichard,
Thank you for reaching out to us. We have considered this issue "Issue with Clearing Value in DropDownList with Virtualization" as a bug from our end, and the fix for the issue will be included in our upcoming weekly release which is expected to be scheduled on end of April 2025.
You can now track the status of the feedback through the link below,
Feedback link: https://www.syncfusion.com/feedback/66582/issue-with-clearing-value-in-dropdownlist-with-virtualization
Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.”
Regards,
Yohapuja S