diff --git a/modules/SystemStats.qml b/modules/SystemStats.qml
index 372a103..a9fe320 100644
--- a/modules/SystemStats.qml
+++ b/modules/SystemStats.qml
@@ -21,7 +21,11 @@ QtObject {
 
     property var _coreGraceTimer: Timer {
         interval: 30000
-        onTriggered: root.cpuCores = []
+        onTriggered: root.cpuCores = root.cpuCores.map(() => ({
+                    "usage": 0,
+                    "freq_ghz": 0,
+                    "history": []
+                }))
     }
     property var cpuCoreMaxFreq: []
     property var cpuCoreTypes: []