diff --git a/src/System.Management.Automation/engine/hostifaces/PowerShell.cs b/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
index 2014d3d5cb1..a2ec0557644 100644
--- a/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
+++ b/src/System.Management.Automation/engine/hostifaces/PowerShell.cs
@@ -2915,6 +2915,9 @@ public IAsyncResult BeginInvoke<T>(PSDataCollection<T> input)
         /// </param>
         /// <param name="callback">
         /// An AsyncCallback to call once the BeginInvoke completes.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
@@ -3036,6 +3039,9 @@ public IAsyncResult BeginInvoke<TInput, TOutput>(PSDataCollection<TInput> input,
         /// </param>
         /// <param name="callback">
         /// An AsyncCallback to call once the BeginInvoke completes.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
@@ -3158,6 +3164,9 @@ public Task<PSDataCollection<PSObject>> InvokeAsync<T>(PSDataCollection<T> input
         /// </param>
         /// <param name="callback">
         /// An AsyncCallback to call once the command is invoked.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
@@ -3264,6 +3273,9 @@ public Task<PSDataCollection<PSObject>> InvokeAsync<TInput, TOutput>(PSDataColle
         /// </param>
         /// <param name="callback">
         /// An AsyncCallback to call once the command is invoked.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
@@ -3733,6 +3745,9 @@ public void Stop()
         /// </summary>
         /// <param name="callback">
         /// A AsyncCallback to call once the BeginStop completes.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
@@ -3794,6 +3809,9 @@ public void EndStop(IAsyncResult asyncResult)
         /// </remarks>
         /// <param name="callback">
         /// An AsyncCallback to call once the command is invoked.
+        /// Note: when using this API in script, don't pass in a delegate that is cast from a script block.
+        /// The callback could be invoked from a thread without a default Runspace and a delegate cast from
+        /// a script block would fail in that case.
         /// </param>
         /// <param name="state">
         /// A user supplied state to call the <paramref name="callback"/>
diff --git a/test/powershell/engine/Api/TaskBasedAsyncPowerShellAPI.Tests.ps1 b/test/powershell/engine/Api/TaskBasedAsyncPowerShellAPI.Tests.ps1
index 8130eade2a0..64b12216949 100644
--- a/test/powershell/engine/Api/TaskBasedAsyncPowerShellAPI.Tests.ps1
+++ b/test/powershell/engine/Api/TaskBasedAsyncPowerShellAPI.Tests.ps1
@@ -207,7 +207,7 @@ try {
             try {
                 $ir = $ps.AddScript("Start-Sleep -Seconds 60").InvokeAsync()
                 Wait-UntilTrue { $ps.InvocationStateInfo.State -eq [System.Management.Automation.PSInvocationState]::Running }
-                $sr = $ps.StopAsync({}, $null)
+                $sr = $ps.StopAsync($null, $null)
                 [System.Threading.Tasks.Task]::WaitAll(@($sr))
                 $sr.IsCompletedSuccessfully | Should -Be $true
                 $ir.IsFaulted | Should -Be $true