From 3c32d1106ec8e4f4b5494441c1ebf53dfd948c61 Mon Sep 17 00:00:00 2001
From: appel_c <christian.appel@psi.ch>
Date: Wed, 3 Sep 2025 10:33:05 +0200
Subject: [PATCH] w

---
 superxas_bec/devices/timepix/timepix.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/superxas_bec/devices/timepix/timepix.py b/superxas_bec/devices/timepix/timepix.py
index ef38649..abce52a 100644
--- a/superxas_bec/devices/timepix/timepix.py
+++ b/superxas_bec/devices/timepix/timepix.py
@@ -76,7 +76,8 @@ class AndStatus(StatusBase):
                     self.set_finished()
 
         for st in self.all_statuses:
-            st.add_callback(inner)
+            with st._lock:
+                st.add_callback(inner)
 
     def __repr__(self):
         return "({self.left!r} & {self.right!r})".format(self=self)