The Grid in-cell editor will not close if the user selects content in more than one cell in the component. This can lead to problems related to uncommitted new values if the user "forgets" to confirm their edits and navigates away.

https://demos.telerik.com/blazor-ui/grid/editing-incell

Observe the inconsistency:

• While in edit mode, select the contents of another single cell. The cell in edit mode will close.
• While in edit mode, drag the mouse to select multiple other cells. The cell in edit mode will not close.

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A possible workaround is to use @onfocusout and the Grid state to detect the problematic behavior and close the edit cell programmatically:

https://blazorrepl.telerik.com/cJFbQIFE08y9GN8A02