diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3226684..c1b9093 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,8 @@
 # Changelog of Cura-DuetRRFPlugin
 
-## v1.2.1: next
+## v1.2.1: 2021-01-21
   * fix button width on high-dpi screens
+  * fix race condition when checking for unmapped settings
 
 ## v1.2.0: 2021-01-10
   * store settings in local preferences instead of sharable metadata
diff --git a/DuetRRFPlugin.py b/DuetRRFPlugin.py
index f254980..5f5eb54 100644
--- a/DuetRRFPlugin.py
+++ b/DuetRRFPlugin.py
@@ -22,6 +22,7 @@ def __init__(self):
         super().__init__()
         self._application = CuraApplication.getInstance()
         self._application.globalContainerStackChanged.connect(self._checkDuetRRFOutputDevices)
+        self._application.initializationFinished.connect(self._delay_check_unmapped_settings)
 
         init_settings()
 
@@ -29,19 +30,21 @@ def __init__(self):
 
         self._found_unmapped = {}
 
-        self._change_timer = QTimer()
-        self._change_timer.setInterval(2000)
-        self._change_timer.setSingleShot(True)
-        self._change_timer.timeout.connect(self._check_unmapped_settings)
-        self._change_timer.start()
-
     def start(self):
         pass
 
     def stop(self, store_data: bool = True):
         pass
 
+    def _delay_check_unmapped_settings(self):
+        self._change_timer = QTimer()
+        self._change_timer.setInterval(10000)
+        self._change_timer.setSingleShot(True)
+        self._change_timer.timeout.connect(self._check_unmapped_settings)
+        self._change_timer.start()
+
     def _check_unmapped_settings(self):
+        Logger.log("d", "called")
         try:
             instances = json.loads(self._application.getPreferences().getValue(DUETRRF_SETTINGS))