Orleans + F# (async issue)

CallerGrain.fs

type SyncXeroPrivateApplicationGrain() = 
    inherit GrainBase()
    interface ISyncXeroPrivateApplicationGrain with
        member this.SynchronizeAsync() =
            let orleansTaskScheduler = TaskScheduler.Current
            async {
                let companyFile = XeroCompanyFile ()
                let guid = 
                    match companyFile.CompanyFileIdentifier with
                    | CompanyFileIdentifier _guid -> _guid

                let uri = companyFile |> saveCompanyFile companyFile.CompanyFileIdentifier 

                //Filthy hack to get the code to run on the orleans task scheduler
                do! Task.Factory.StartNew((fun () ->
                        let plotGrain = GenerateAccountBalanceCsvGrainFactory.GetGrain(0L)
                        plotGrain.GenerateCsvAsync(guid)), CancellationToken.None, TaskCreationOptions.None, orleansTaskScheduler).Unwrap() 
                    |> Async.AwaitTask |> Async.Ignore
                
                return uri
            } 
            |> Async.StartAsTask

https://github.com/fsprojects/fsharpx/blob/7246e314e3fdeae07f3465b9126f2bc22faa0cd5/src/FSharpx.Core/Async.fs#L43-L45?