diff --git a/Src/Common/Controls/DetailControls/StringSlice.cs b/Src/Common/Controls/DetailControls/StringSlice.cs
index 828b1f4db5..8f42acf794 100644
--- a/Src/Common/Controls/DetailControls/StringSlice.cs
+++ b/Src/Common/Controls/DetailControls/StringSlice.cs
@@ -378,6 +378,10 @@ public override void Display(IVwEnv vwenv, int hvo, int frag)
 		#endregion // View Constructors
 
 		#region RootSite implementation
+		/// <summary>
+		/// This is a RootSiteControl that displays a non-multilingual string slice
+		/// Data entry should always default to the DefaultAnalWs writing system according to LT-22145
+		/// </summary>
 		class StringSliceView : RootSiteControl, INotifyControlInCurrentSlice
 		{
 			ICmObject m_obj;
@@ -421,6 +425,14 @@ public int DefaultWs
 						(m_vc as StringSliceVc).DefaultWs = value;
 				}
 			}
+
+			public override int WsPending
+			{
+				// Ignore requests to set pending writing system, this slice always deals with the DefaultAnalWs.
+				// ReSharper disable once ValueParameterNotUsed
+				set { }
+				get => Cache != null ? Cache.DefaultAnalWs : -1;
+			}
 			#region IDisposable override
 
 			/// <summary>
diff --git a/Src/Common/SimpleRootSite/SimpleRootSite.cs b/Src/Common/SimpleRootSite/SimpleRootSite.cs
index a88bb8dec5..2f64e11ea1 100644
--- a/Src/Common/SimpleRootSite/SimpleRootSite.cs
+++ b/Src/Common/SimpleRootSite/SimpleRootSite.cs
@@ -1692,7 +1692,7 @@ public virtual Rectangle AdjustedClientRectangle
 		/// informtion away and reset the keyboard).
 		/// </remarks>
 		/// -----------------------------------------------------------------------------------
-		public int WsPending
+		public virtual int WsPending
 		{
 			get
 			{