Deselect previously selected CheckBoxList items

Several items in the CheckBoxList component are selected at first (coming from the API).

Secondly, one point I noticed is that they are not able to deselect these items. I can only modify items that are not selected at first.

private string equipmentOptions { get; set; } = "";

/*API call*/
equipmentList = "Medicines, Materials, Equipment"

equipmentOptions = equipmentList....
<RadzenLabel Text="Materials, Instrumentals, Equipment and Medicines"
             Component="InputMaterials"
             class="sr-only" />

<RadzenCheckBoxList Name="InputMaterials"
                    @bind-Value="modelEquipment.V_DS_EQUIPMENT"
                    TValue="string">
    <Items>
        @foreach (var equipment in equipmentOptions.Split(","))
        {
            <RadzenCheckBoxListItem Text="@equipment"
                                    Value="@equipment" />
        }
    </Items>
</RadzenCheckBoxList>

Our demos are with preselected items as well: