diff --git a/app/src/main/java/com/yoyostudios/clashcompanion/MainActivity.kt b/app/src/main/java/com/yoyostudios/clashcompanion/MainActivity.kt
index 0329b80..a62c615 100644
--- a/app/src/main/java/com/yoyostudios/clashcompanion/MainActivity.kt
+++ b/app/src/main/java/com/yoyostudios/clashcompanion/MainActivity.kt
@@ -286,8 +286,9 @@ class MainActivity : ComponentActivity() {
     override fun onDestroy() {
         super.onDestroy()
         overlayManager?.hide()
-        HandDetector.stopScanning()
-        CardClassifier.destroy()
+        HandDetector.destroy()
+        // CardClassifier is a process-scoped singleton (PyTorch). Destroying it while a scan coroutine
+        // is mid-inference can crash native code (destroyed mutex). Let the OS clean up on process exit.
         scope.cancel()
     }
 }
diff --git a/app/src/main/java/com/yoyostudios/clashcompanion/command/CommandRouter.kt b/app/src/main/java/com/yoyostudios/clashcompanion/command/CommandRouter.kt
index eccd2f8..4a9928f 100644
--- a/app/src/main/java/com/yoyostudios/clashcompanion/command/CommandRouter.kt
+++ b/app/src/main/java/com/yoyostudios/clashcompanion/command/CommandRouter.kt
@@ -865,6 +865,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
             val msg = "Low confidence: $card? ($pct% < ${(threshold * 100).toInt()}%)"
             overlay?.updateStatus(msg)
             Log.w(TAG, "CMD: $msg")
+            isBusy = false
             return
         }
 
@@ -878,6 +879,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
             val msg = "Not in hand: $card (hand: $handCards)"
             overlay?.updateStatus(msg)
             Log.w(TAG, "CMD: $msg")
+            isBusy = false
             return
         }
 
@@ -885,6 +887,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
             val msg = "ERROR: Invalid slot index $slotIndex for $card"
             overlay?.updateStatus(msg)
             Log.e(TAG, "CMD: $msg")
+            isBusy = false
             return
         }
 
@@ -901,6 +904,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
                 val msg = "ERROR: No zone for $card"
                 overlay?.updateStatus(msg)
                 Log.e(TAG, "CMD: $msg")
+                isBusy = false
                 return
             }
             val zoneCoords = Coordinates.ZONE_MAP[zone]
@@ -908,6 +912,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
                 val msg = "ERROR: Unknown zone '$zone'"
                 overlay?.updateStatus(msg)
                 Log.e(TAG, "CMD: $msg")
+                isBusy = false
                 return
             }
             zoneX = zoneCoords.first
@@ -920,6 +925,7 @@ Or if waiting is better: {"action":"wait","reasoning":"<15 words max>"}"""
             val msg = "ERROR: Accessibility service not connected"
             overlay?.updateStatus(msg)
             Log.e(TAG, "CMD: $msg")
+            isBusy = false
             return
         }