diff --git a/src/node/wrapper_helpers.py b/src/node/wrapper_helpers.py
index 8710ed556..7c9dd1a2d 100644
--- a/src/node/wrapper_helpers.py
+++ b/src/node/wrapper_helpers.py
@@ -45,6 +45,17 @@ class EventCollector:
         with self._lock:
             return [e for e in self.events if e.get("requestId") == request_id]
 
+    def snapshot(self) -> list[dict]:
+        """Return a thread-safe copy of all collected events.
+
+        Use this whenever you need to iterate over every event (rather than
+        events for a single request_id). Iterating `self.events` directly is
+        unsafe because `event_callback` appends from the wrapper's event
+        thread.
+        """
+        with self._lock:
+            return list(self.events)
+
 
 def is_propagated_event(event: dict) -> bool:
     return event.get("eventType") == EVENT_PROPAGATED
@@ -120,10 +131,9 @@ def wait_for_connected(
     """Wait until a connection_status_change event with PartiallyConnected or Connected arrives."""
     deadline = time.monotonic() + timeout_s
     while time.monotonic() < deadline:
-        with collector._lock:
-            for event in collector.events:
-                if event.get("eventType") == "connection_status_change" and event.get("connectionStatus") in ("PartiallyConnected", "Connected"):
-                    return event
+        for event in collector.snapshot():
+            if event.get("eventType") == "connection_status_change" and event.get("connectionStatus") in ("PartiallyConnected", "Connected"):
+                return event
         time.sleep(poll_interval_s)
     return None
 
@@ -201,7 +211,7 @@ def assert_no_unknown_request_ids(collector: EventCollector, issued_request_ids)
     the wrong request id under concurrency.
     """
     issued = set(issued_request_ids)
-    for event in collector.events:
+    for event in collector.snapshot():
         event_request_id = event.get("requestId")
         if event_request_id is None:
             continue
diff --git a/tests/wrappers_tests/test_send_e2e_part1.py b/tests/wrappers_tests/test_send_e2e_part1.py
index 7ef272f0d..a4bd86c6a 100644
--- a/tests/wrappers_tests/test_send_e2e_part1.py
+++ b/tests/wrappers_tests/test_send_e2e_part1.py
@@ -1,4 +1,5 @@
 from concurrent.futures import ThreadPoolExecutor
+
 import pytest
 from src.env_vars import NODE_2
 from src.steps.common import StepsCommon
@@ -805,7 +806,7 @@ class TestSendBeforeRelay(StepsStore):
                 # Cross-association guard: every event with a requestId must
                 # belong to exactly one of the request ids we issued.
                 issued = set(request_ids)
-                for event in sender_collector.events:
+                for event in sender_collector.snapshot():
                     event_request_id = event.get("requestId")
                     if event_request_id is None:
                         continue
@@ -917,7 +918,7 @@ class TestSendBeforeRelay(StepsStore):
                 assert error_event is None, f"Unexpected terminal message_error for phase-2 " f"request_id={request_id} after recovery: {error_event}"
 
             issued = set(all_request_ids)
-            for event in sender_collector.events:
+            for event in sender_collector.snapshot():
                 event_request_id = event.get("requestId")
                 if event_request_id is None:
                     continue