Adding iteration delay to address issue with capturing in frames when scenes are still loading.

com.unity.perception/Runtime/Randomization/Scenarios/ScenarioBase.cs

         public TextAsset configuration;
 
         private bool m_ShouldRestartIteration;
+        private bool m_ShouldDelayIteration;
+
         private const int k_MaxIterationStartCount = 100;
 
         /// <summary>
                 do
                 {
                     m_ShouldRestartIteration = false;
+                    m_ShouldDelayIteration = false;
                     iterationStartCount++;
                     foreach (var randomizer in activeRandomizers)
                     {
+
+                        if (m_ShouldDelayIteration)
+                        {
+                            Debug.Log($"Iteration was delayed by {randomizer.GetType().Name}");
+                            break;
+                        }
+                    if (m_ShouldDelayIteration)
+                        break;
                 } while (m_ShouldRestartIteration && iterationStartCount < k_MaxIterationStartCount);
 
                 if (m_ShouldRestartIteration)
                 randomizer.Update();
 
             // Iterate scenario frame count
-            currentIterationFrame++;
+            if (!m_ShouldDelayIteration)
+                currentIterationFrame++;
+
             framesSinceInitialization++;
         }
 
         public void RestartIteration()
         {
             m_ShouldRestartIteration = true;
+        }
+
+        public void DelayIteration()
+        {
+            m_ShouldDelayIteration = true;
         }
     }
 }