I made a Blazor REPL reproduction: https://blazorrepl.telerik.com/mcuCGpYr4223mhWY49. Run and observe the person label is overlapping the dropdown.
How to reproduce:
<TelerikFloatingLabel Text="Person">
<TelerikComboBox
TItem="@Person" TValue="@int"
ScrollMode="@DropDownScrollMode.Virtual"
OnRead="@GetRemoteData"
ValueMapper="@GetModelFromValue"
ItemHeight="30"
PageSize="20"
TextField="@nameof(Person.Name)"
ValueField="@nameof(Person.Id)"
@bind-Value="@SelectedValue"
Filterable="true" FilterOperator="@StringFilterOperator.Contains">
<ComboBoxSettings>
<ComboBoxPopupSettings Height="200px" />
</ComboBoxSettings>
</TelerikComboBox>
</TelerikFloatingLabel>