The behavior is reproducible in server-side apps when using the Inline or Incell mode and editing numerical values.

When inputting into the field the first value input is either ignored or removed. The default is 0, when backspacing to clear it and then inputting a number, sometimes the number is shown and then immediately removed, and sometimes it's not shown at all and will only displayed when typed a second time.

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ADMIN EDIT

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Possible workarounds for the time being:

• Use EditorTemplate with a NumericTextBox component inside: https://blazorrepl.telerik.com/cyvOYBvc39Vnes2L43.
• Use Popup Edit mode.