diff --git a/COMET.Web.Common/COMET.Web.Common.csproj b/COMET.Web.Common/COMET.Web.Common.csproj
index 8c7d23c3..cab7d65a 100644
--- a/COMET.Web.Common/COMET.Web.Common.csproj
+++ b/COMET.Web.Common/COMET.Web.Common.csproj
@@ -38,6 +38,7 @@
     <PackageReference Include="Microsoft.Extensions.Configuration.Abstractions" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.1" />
     <PackageReference Include="ReactiveUI" Version="19.5.41" />
+    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
   </ItemGroup>
   <ItemGroup>
     <None Include="..\README.md" Pack="true" PackagePath="\" />
diff --git a/COMETwebapp/ViewModels/Components/SystemRepresentation/SystemRepresentationBodyViewModel.cs b/COMETwebapp/ViewModels/Components/SystemRepresentation/SystemRepresentationBodyViewModel.cs
index 0ee4990f..15800d6f 100644
--- a/COMETwebapp/ViewModels/Components/SystemRepresentation/SystemRepresentationBodyViewModel.cs
+++ b/COMETwebapp/ViewModels/Components/SystemRepresentation/SystemRepresentationBodyViewModel.cs
@@ -126,8 +126,6 @@ public async Task ApplyFilters()
         /// <param name="selectedOption">the selected <see cref="Option" /></param>
         public void OnOptionFilterChange(Option selectedOption)
         {
-            this.Elements.Clear();
-
             var nestedElements = this.CurrentThing.QueryNestedElements(selectedOption).ToList();
 
             var associatedElements = new List<ElementUsage>();