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Error when add task from context menu

Hi,

  1. If we want to add a new 
task from the context menu, it stops with the following error message(
About 8 times out of 10 attempts [refres browser] ):


Error: System.NullReferenceException: Object reference not set to an instance of an object.

   at Syncfusion.Blazor.Gantt.Internal.EditBase`1.AddNewRecord(IDictionary`2 record, RowPosition rowPosition, Nullable`1 index)

   at Syncfusion.Blazor.Gantt.Internal.ContextMenu`1.ContextMenuClickHandler(String item)

   at Syncfusion.Blazor.Gantt.Internal.ContextMenu`1.ChartContextMenuClickHandler(MenuEventArgs`1 args)

   at Syncfusion.Blazor.Gantt.Internal.ChartContextMenuRenderer`1.ContextMenuItemClickHandler(MenuEventArgs`1 args)

   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)

   at Syncfusion.Blazor.Internal.SfBaseUtils.InvokeEvent[T](Object eventFn, T eventArgs)

   at Syncfusion.Blazor.Navigations.Internal.SfMenuBase`1.ClickHandler[T](List`1 menuItems, T item, EventArgs e, Boolean isEnterKey, Boolean isUl, Boolean header, Boolean hamburgerMode)

   at Syncfusion.Blazor.Navigations.SfContextMenu`1.ItemClickHandler(TValue item, MouseEventArgs e, Boolean isEnterKey, Boolean isUl, Boolean header)

   at Syncfusion.Blazor.Navigations.SfContextMenu`1.<>c__DisplayClass71_2.<b__7>d.MoveNext()

--- End of stack trace from previous location ---

   at Microsoft.AspNetCore.Components.ComponentBase.CallStateHasChangedOnAsyncCompletion(Task task)

   at Microsoft.AspNetCore.Components.RenderTree.Renderer.GetErrorHandledTask(Task taskToHandle, ComponentState owningComponentState)



With keyboad (press insert key )->performs the operation!!?

Interestingly, when it is successfully executed, the new task created by the add below command appears above the original one.

BelowElott.png


BelowUtan.png

2. The same way : On the Task Information menu item, we receive the following error:

TaskInfo.png


Please help me where the error could be!

Thanks in advance !