diff --git a/RELEASE.md b/RELEASE.md
index 0e520a2..d9c0888 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -13,6 +13,10 @@
 - Removed Print/Print_some/Print_all form NDArray (operator << still works)
 - Added const* version of .data()
 
+### Bugfixes: 
+
+ - multi threaded cluster finder doesnt drop frames if queues are full 
+
 
 ### 2025.11.21
 
diff --git a/include/aare/ClusterFinderMT.hpp b/include/aare/ClusterFinderMT.hpp
index 42e8105..b5df766 100644
--- a/include/aare/ClusterFinderMT.hpp
+++ b/include/aare/ClusterFinderMT.hpp
@@ -73,8 +73,11 @@ class ClusterFinderMT {
                 switch (frame->type) {
                 case FrameType::DATA:
                     cf->find_clusters(frame->data.view(), frame->frame_number);
-                    m_output_queues[thread_id]->write(
-                        cf->steal_clusters(realloc_same_capacity));
+                    while (!m_output_queues[thread_id]->write(
+                        cf->steal_clusters(realloc_same_capacity))) {
+                        std::this_thread::sleep_for(m_default_wait);
+                    }
+
                     break;
 
                 case FrameType::PEDESTAL: