diff --git a/src/slic3r/GUI/Plater.cpp b/src/slic3r/GUI/Plater.cpp
index 77ca0ad4e0..af589a127e 100644
--- a/src/slic3r/GUI/Plater.cpp
+++ b/src/slic3r/GUI/Plater.cpp
@@ -2110,8 +2110,15 @@ Sidebar::Sidebar(Plater *parent)
     p->m_panel_filament_title->SetBackgroundColor(title_bg);
     p->m_panel_filament_title->SetBackgroundColor2(0xF1F1F1);
     p->m_panel_filament_title->Bind(wxEVT_LEFT_UP, [this](wxMouseEvent &e) {
-        if (e.GetPosition().x > (p->m_flushing_volume_btn->IsShown()
-                ? p->m_flushing_volume_btn->GetPosition().x : (p->m_bpButton_add_filament->GetPosition().x - FromDIP(30)))) // ORCA exclude area of del button from titlebar collapse/expand feature to fix undesired collapse when user spams del filament button 
+        if (!p || !p->m_panel_filament_content || !m_scrolled_sizer || !p->m_bpButton_set_filament || !p->m_flushing_volume_btn || !p->m_bpButton_add_filament || !ams_btn)
+            return;
+        // ORCA exclude area of del button from titlebar collapse/expand feature to fix undesired collapse when user spams del filament button
+        // also block fold/unfold feature when user clicks to spacing between icons
+        int exclude_pt = p->m_bpButton_set_filament->GetPosition().x; // maximum fixed item
+        if      (p->m_flushing_volume_btn->IsShown())   exclude_pt = p->m_flushing_volume_btn->GetPosition().x;
+        else if (p->m_bpButton_add_filament->IsShown()) exclude_pt = p->m_bpButton_add_filament->GetPosition().x - FromDIP(30); // reserve spacing for delete button
+        else if (ams_btn->IsShown())                    exclude_pt = ams_btn->GetPosition().x;
+        if (e.GetPosition().x > exclude_pt)
             return;
         p->m_panel_filament_content->Show(!p->m_panel_filament_content->IsShown());
         m_scrolled_sizer->Layout();