diff --git a/server/TracyWorker.cpp b/server/TracyWorker.cpp
index 90a51ab9..c40aaa0f 100644
--- a/server/TracyWorker.cpp
+++ b/server/TracyWorker.cpp
@@ -4621,10 +4621,14 @@ void Worker::ProcessCallstackSample( const QueueCallstackSample& ev )
     }
     else
     {
-        if( td->samples.back().time.Val() <= t )
+        if( td->samples.back().time.Val() < t )
         {
             td->samples.push_back_non_empty( sd );
         }
+        else if( td->samples.back().time.Val() == t )
+        {
+            td->samples.back() = sd;
+        }
         else
         {
             const auto it = std::lower_bound( td->samples.begin(), td->samples.end(), t, [] ( const auto& l, const auto& r ) { return l.time.Val() < r; } );