diff --git a/src/PerfView/GcStats.cs b/src/PerfView/GcStats.cs
index 9b1c6fa72..81760e22e 100644
--- a/src/PerfView/GcStats.cs
+++ b/src/PerfView/GcStats.cs
@@ -917,9 +917,15 @@ private static void PrintEventCondemnedReasonsTable(TextWriter writer, TraceProc
                         continue;
                     }
                 }
-                events.Add(_event);
                 int heapIndexHighestGen;
-                condemnedReasonRows.Add(GetCondemnedReasonRow(_event, out heapIndexHighestGen));
+                byte[] condemnedReasonRow = GetCondemnedReasonRow(_event, out heapIndexHighestGen);
+                if (condemnedReasonRow == null)
+                {
+                    // No per-heap or global condemned reasons information available for this event.
+                    continue;
+                }
+                events.Add(_event);
+                condemnedReasonRows.Add(condemnedReasonRow);
                 if (isServerGC)
                 {
                     heapIndexes.Add(heapIndexHighestGen);
diff --git a/src/TraceEvent/Computers/TraceManagedProcess.cs b/src/TraceEvent/Computers/TraceManagedProcess.cs
index 49f591d1a..d85cadd8c 100644
--- a/src/TraceEvent/Computers/TraceManagedProcess.cs
+++ b/src/TraceEvent/Computers/TraceManagedProcess.cs
@@ -4773,7 +4773,10 @@ internal void AddConcurrentPauseTime(TraceGC _event, double RestartEEMSec)
             }
             else
             {
-                Debug.Assert(_event.PauseDurationMSec == 0);
+                // For a BackgroundGC the initial pause is pre-seeded with SuspendDurationMSec
+                // at GCStart time (see the BGC branch in the GCStart handler), so PauseDurationMSec
+                // may already be non-zero when we get here. Overwrite it with the full pause
+                // (SuspendEE start -> RestartEE end), which is the authoritative value.
                 _event.PauseDurationMSec = RestartEEMSec - _event.PauseStartRelativeMSec;
             }
         }