Fix.

Author: ilonatommy

src/Components/Server/src/Circuits/CircuitHost.cs

@@ -687,6 +687,8 @@ private void AssertInitialized()
         }
     }
 
+    internal bool IsDisposed() =>_disposed;
+
     private void AssertNotDisposed()
     {
 #pragma warning disable CA1513 // Use ObjectDisposedException throw helper

src/Components/Server/src/Circuits/CircuitPersistenceManager.cs

@@ -21,6 +21,11 @@ internal partial class CircuitPersistenceManager(
 {
     public async Task PauseCircuitAsync(CircuitHost circuit, bool saveStateToClient = false, CancellationToken cancellation = default)
     {
+        if (circuit.IsDisposed())
+        {
+            return;
+        }
+
         var renderer = circuit.Renderer;
         var persistenceManager = circuit.Services.GetRequiredService<ComponentStatePersistenceManager>();
         var collector = new CircuitPersistenceManagerCollector(circuitOptions, serverComponentSerializer, circuit.Renderer);