diff --git a/src/slic3r/GUI/SelectMachine.cpp b/src/slic3r/GUI/SelectMachine.cpp
index cb6dbdcfa9..9eefc4dea7 100644
--- a/src/slic3r/GUI/SelectMachine.cpp
+++ b/src/slic3r/GUI/SelectMachine.cpp
@@ -2313,7 +2313,7 @@ void SelectMachineDialog::on_ok_btn(wxCommandEvent &event)
         }
 
         confirm_dlg.on_show();
-    } 
+    }
     else
     {
         this->on_send_print();
@@ -4185,7 +4185,6 @@ void SelectMachineDialog::set_default_from_sdcard()
         m_sizer_ams_mapping_right->Layout();
         m_filament_panel_right_sizer->Layout();
         m_filament_right_panel->Layout();
-        m_mapping_popup.set_show_type(ShowType::LEFT_AND_RIGHT);
 
     } else {
         m_filament_left_panel->Hide();
@@ -4194,7 +4193,6 @@ void SelectMachineDialog::set_default_from_sdcard()
         m_sizer_ams_mapping->SetCols(8);
         m_sizer_ams_mapping->Layout();
         m_filament_panel_sizer->Layout();
-        m_mapping_popup.set_show_type(ShowType::RIGHT);
     }
 
     //init MaterialItem
@@ -4237,7 +4235,7 @@ void SelectMachineDialog::set_default_from_sdcard()
         }
 
         item->Bind(wxEVT_LEFT_UP, [this, item, materials](wxMouseEvent& e) {});
-        item->Bind(wxEVT_LEFT_DOWN, [this, obj_, item, materials, fo](wxMouseEvent& e) {
+        item->Bind(wxEVT_LEFT_DOWN, [this, obj_, item, materials, diameters_count, filament_map, fo](wxMouseEvent& e) {
             MaterialHash::iterator iter = m_materialList.begin();
             while (iter != m_materialList.end()) {
                 int           id = iter->first;
@@ -4263,6 +4261,16 @@ void SelectMachineDialog::set_default_from_sdcard()
                 pos.y += item->GetRect().height;
                 m_mapping_popup.Move(pos);
 
+                if (diameters_count > 1) {
+                    if (obj_ && can_hybrid_mapping(obj_->m_extder_data)) {
+                        m_mapping_popup.set_show_type(ShowType::LEFT_AND_RIGHT);
+                    } else if (filament_map[m_current_filament_id] == 1) {
+                        m_mapping_popup.set_show_type(ShowType::LEFT);
+                    } else if (filament_map[m_current_filament_id] == 2) {
+                        m_mapping_popup.set_show_type(ShowType::RIGHT);
+                    }
+                }
+
                 if (obj_ &&
                     obj_->has_ams() &&
                     (m_checkbox_list["use_ams"]->getValue() == "on") &&
diff --git a/src/slic3r/GUI/Widgets/AMSControl.cpp b/src/slic3r/GUI/Widgets/AMSControl.cpp
index 58f870a01c..92f9f007bc 100644
--- a/src/slic3r/GUI/Widgets/AMSControl.cpp
+++ b/src/slic3r/GUI/Widgets/AMSControl.cpp
@@ -1595,7 +1595,7 @@ void AMSControl::SetAmsStep(std::string ams_id, std::string canid, AMSPassRoadTy
     if (model == EXT_AMS && ams->get_ext_type() == AMSModelOriginType::GENERIC_EXT) {
         if (m_ams_info.size() == 0 && m_ext_info.size() == 1) {
             left = true;
-            length = 49;
+            length = 50;
         } else {
             length = left ? 110 : 82;
         }