how to show a alert if table is empty? - mudblazor

Question

I want to show a alert if table is empty, problem is that i have to click twice before he is hitting
the else statement to show my alert.
I use a overlay to show the devices.
I tried OnafterrenderAsync, OnInitializedAsync, OnParameterSetAsync
If the api call gets devices than there is no problem, the table is loading but if there is no data in the table he doesn't go to the else statement to show my mudalert
<PageTitle>#AccountResource.DevicesLinkLabel</PageTitle>
#if (isLoading)
{
}
else
{
#if (!isShowing)
{
<MudTable T="DeviceModel" ServerData="#(new Func<TableState, Task<TableData<DeviceModel>>>(LoadData))" Hover="true" Breakpoint="Breakpoint.Sm" Dense="true" #ref="table">
<HeaderContent>
<MudTh>#AccountResource.DevicesLinkLabel</MudTh>
<MudTh>#SharedResource.Type</MudTh>
<MudTh>#SharedResource.Version</MudTh>
<MudTh>#SharedResource.VersionAppNumber</MudTh>
</HeaderContent>
<RowTemplate>
<MudTd DataLabel="DeviceName">#context.DisplayName</MudTd>
<MudTd DataLabel="DeviceType">#context.Type</MudTd>
<MudTd DataLabel="DeviceVersion">#context.Version</MudTd>
<MudTd DataLabel="DeviceVersionAppNumber">#context.VersionAppNumber</MudTd>
</RowTemplate>
<PagerContent>
<MudTablePager />
</PagerContent>
</MudTable>
}
else
{
<MudAlert Severity="MudBlazor.Severity.Warning">#SharedResource.NothingToShow</MudAlert>
}
}
#code {
[Parameter]
public long UserId { get; set; }
[Parameter]
public long OrganisationId { get; set; }
[Parameter]
public EventCallback<ModelBase> ShowResponseInToast { get; set; }
private MudTable<DeviceModel>? table;
private bool isLoading = true;
private bool isShowing;
protected override async Task OnParametersSetAsync()
{
try
{
if (table != null)
{
//table.CurrentPage = 0;s
await table.ReloadServerData();
}
}
finally
{
isLoading = false;
}
}
private async Task<TableData<DeviceModel>> LoadData(TableState state)
{
var request = new GetDeviceRequest
{
OrganisationId = OrganisationId,
UserId = UserId,
Page = state.Page,
PageSize = state.PageSize,
};
var response = await DeviceManagerClient.GetDeviceResponseAsync(request);
if (table?.Items?.Any() == true)
{
isShowing = false;
return new TableData<DeviceModel>
{
Items = response.Results,
TotalItems = response.TotalCount
};
}
else
{
isShowing = true;
return new TableData<DeviceModel>
{
Items = response.Results,
};
}
}
}