Grouping RadzenGrid null values bug

Hello Radzen Team!
There is a bug when tried grouping columns contains null values.
Should be easy to reproduce.

Thanks for the report! We will do our best to provide fix as soon as possible.

Hi @Diego_S,

Unfortunately I was not able to reproduce it on our demos:

Any additional info?

Thanks for the reply.
On the demo site, in the "Group Header Template" sector, I try to group the column "customer". On page 13 (where there are null values) the site is not responding.
In the case of my application I get the expcion:

Error: Microsoft.CSharp.RuntimeBinder.RuntimeBinderException: The call is ambiguous between the following methods or properties: 'Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder.AddContent(int, string)' and 'Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder.AddContent(int, Microsoft.AspNetCore.Components.RenderFragment)'
at CallSite.Target(Closure , CallSite , RenderTreeBuilder , Int32 , Object )
at System.Dynamic.UpdateDelegates.UpdateAndExecuteVoid3[T0,T1,T2](CallSite site, T0 arg0, T1 arg1, T2 arg2)
at UTE.GI.Inventario.Web.Pages.ListadodeInventario.<>c__DisplayClass0_0.b__15(RenderTreeBuilder __builder2)
at Microsoft.AspNetCore.Components.Rendering.RenderTreeBuilder.AddContent(Int32 sequence, RenderFragment fragment)
at Radzen.Blazor.RadzenDataGridGroupRow`1.BuildRenderTree(RenderTreeBuilder __builder)
at Microsoft.AspNetCore.Components.Rendering.ComponentState.RenderIntoBatch(RenderBatchBuilder batchBuilder, RenderFragment renderFragment)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.RenderInExistingBatch(RenderQueueEntry renderQueueEntry)
at Microsoft.AspNetCore.Components.RenderTree.Renderer.ProcessRenderQueue()

I've updated the demo. You can check if the @context.Data.Key is null when using in group templates.

Thank you!