diff --git a/source/panel/curve_panel/background_panel/background_panel.cpp b/source/panel/curve_panel/background_panel/background_panel.cpp
index 2f10a9a..3f7ca2e 100644
--- a/source/panel/curve_panel/background_panel/background_panel.cpp
+++ b/source/panel/curve_panel/background_panel/background_panel.cpp
@@ -15,7 +15,7 @@ namespace zlPanel {
                                  zlInterface::UIBase &base)
         : uiBase(base),
           gridPanel(base) {
-        juce::ignoreUnused(parameters);
+        juce::ignoreUnused(parameters, parametersNA);
         setInterceptsMouseClicks(false, true);
         setOpaque(true);
         addAndMakeVisible(gridPanel);
@@ -29,7 +29,6 @@ namespace zlPanel {
     }
 
     void BackgroundPanel::resized() {
-        auto bound = getLocalBounds().toFloat();
         gridPanel.setBounds(getLocalBounds());
     }
 }
diff --git a/source/panel/curve_panel/button_panel/button_panel.cpp b/source/panel/curve_panel/button_panel/button_panel.cpp
index 892db6a..319e0b7 100644
--- a/source/panel/curve_panel/button_panel/button_panel.cpp
+++ b/source/panel/curve_panel/button_panel/button_panel.cpp
@@ -203,6 +203,7 @@ namespace zlPanel {
         }
 
         itemsSet.deselectAll();
+        previousLassoNum = 0;
         lassoComponent.setColour(juce::LassoComponent<size_t>::lassoFillColourId,
                                  uiBase.getTextColor().withMultipliedAlpha(.25f));
         lassoComponent.setColour(juce::LassoComponent<size_t>::lassoOutlineColourId,
@@ -482,11 +483,12 @@ namespace zlPanel {
                 panels[idx]->repaint();
             }
         }
-        if (currentSelectedNum == 1 && currentFirstSelectIdx != static_cast<int>(selectBandIdx.load())) {
+        if (previousLassoNum == 0 && currentSelectedNum > 0 && currentFirstSelectIdx != static_cast<int>(selectBandIdx.load())) {
             auto *para = parametersNARef.getParameter(zlState::selectedBandIdx::ID);
             para->beginChangeGesture();
             para->setValueNotifyingHost(zlState::selectedBandIdx::convertTo01(currentFirstSelectIdx));
             para->endChangeGesture();
+            previousLassoNum = currentSelectedNum;
         }
         loadPreviousParameters();
     }
diff --git a/source/panel/curve_panel/button_panel/button_panel.hpp b/source/panel/curve_panel/button_panel/button_panel.hpp
index e9c66ea..7966011 100644
--- a/source/panel/curve_panel/button_panel/button_panel.hpp
+++ b/source/panel/curve_panel/button_panel/button_panel.hpp
@@ -103,6 +103,7 @@ namespace zlPanel {
 
         juce::LassoComponent<size_t> lassoComponent;
         juce::SelectedItemSet<size_t> itemsSet;
+        int previousLassoNum{0};
         std::atomic<bool> isLeftClick{true};
         std::array<std::atomic<float>, zlState::bandNUM> previousFreqs{}, previousGains{}, previousQs{};