diff --git a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
index 5d54f50..f63af37 100644
--- a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
+++ b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
@@ -432,18 +432,24 @@ class MCSCardCSAXS(PSIDeviceBase, MCSCard):
         self._start_monitor_async_data_emission.clear()  # Stop monitoring
         # NOTE Important check as set_finished or set_exception should not be called
         # if the status is already done (e.g. cancelled externally)
-        logger.info(f"Status callback called for {self.name}, exception: {exception}")
-        if status.done:
-            return  # Already done and cancelled externally.
-        if exception:
-            status.set_exception(exception)
-        else:
-            status.set_finished()
+        logger.info(
+            f"Status callback called for {self.name}, exception: {exception} of status {status}."
+        )
+        with self._rlock:
+            if status.done:
+                return  # Already done and cancelled externally.
+            if exception is not None:
+                logger.info(f"Setting exception for status of {self.name} in complete.")
+                status.set_exception(exception)
+            else:
+                logger.info(f"Setting finished for status of {self.name} in complete.")
+                status.set_finished()
 
     def _status_failed_callback(self, status: StatusBase) -> None:
         """Callback for status failure, the monitoring thread should be stopped."""
         # NOTE Check for status.done and status.success is important to avoid
         if status.done:
+
             self._start_monitor_async_data_emission.clear()  # Stop monitoring
 
     def on_complete(self) -> CompareStatus: