ComboBox with AllowCustom is losing keystrokes randomly at normal typing speed

This ComboBox, with filtering and custom values enabled, glitches when typing in the box. At a normal typing speed, I'm seeing that about 10% of keystrokes are skipped, or appear briefly and then disappear.

<TelerikComboBox Data="@_data"
                 @bind-Value="@_value"
                 AllowCustom="true"
                 Filterable="true"
                 FilterOperator="@StringFilterOperator.Contains"
                 Enabled="@Enabled"></TelerikComboBox>
...
List<string> _data = new() { "Lorem", "ipsum", "dolor", "sit", "amet", "consectetur", "adipiscing", "elit" };
string _value { get; set; }

Dropped letters are slightly less frequent with DebounceDelay="0" ; it's worse with more items in the list. It seems to occur if you type more than 3-4 letters per second.

Also, clicking the cursor in the middle of the text and typing can cause the cursor to jump to the end of the input and jumble your letters around.