diff --git a/firmware/Rhythm/Rhythm.ino b/firmware/Rhythm/Rhythm.ino
index 2f0beaa..fd29dee 100644
--- a/firmware/Rhythm/Rhythm.ino
+++ b/firmware/Rhythm/Rhythm.ino
@@ -79,6 +79,7 @@ int current_step = 0;
 
 volatile int cv1_val = 0;
 volatile int cv2_val = 0;
+int last_mapped_slot = -1;
 
 // LFSR State for Chaos
 uint16_t lfsr = 0xACE1;
@@ -175,11 +176,16 @@ void ProcessSequencerTick(uint32_t tick) {
     
     if (cv1_dest == CV_DEST_PRESET || cv2_dest == CV_DEST_PRESET) {
       int mapped_slot = constrain(map(preset_cv, 0, 512, 0, 4), 0, 4);
-      if (active_pattern != mapped_slot) {
-        active_pattern = mapped_slot;
-        selected_slot = mapped_slot + 1;
-        needs_redraw = true;
+      if (mapped_slot != last_mapped_slot) {
+        last_mapped_slot = mapped_slot;
+        if (active_pattern != mapped_slot) {
+          active_pattern = mapped_slot;
+          selected_slot = mapped_slot + 1;
+          needs_redraw = true;
+        }
       }
+    } else {
+      last_mapped_slot = -1;
     }
 
     PatternState &p = patterns[active_pattern];