diff --git a/shell/browser/api/atom_api_browser_window_mac.mm b/shell/browser/api/atom_api_browser_window_mac.mm
index 08dd00ed62f4e..8d0108d2f263c 100644
--- a/shell/browser/api/atom_api_browser_window_mac.mm
+++ b/shell/browser/api/atom_api_browser_window_mac.mm
@@ -101,9 +101,11 @@ - (NSView*)hitTest:(NSPoint)aPoint {
 
   // Draggable regions is implemented by having the whole web view draggable
   // (mouseDownCanMoveWindow) and overlaying regions that are not draggable.
-  draggable_regions_.clear();
-  for (const auto& r : regions)
-    draggable_regions_.push_back(r.Clone());
+  if (&draggable_regions_ != &regions) {
+    draggable_regions_.clear();
+    for (const auto& r : regions)
+      draggable_regions_.push_back(r.Clone());
+  }
   std::vector<gfx::Rect> drag_exclude_rects;
   if (regions.empty()) {
     drag_exclude_rects.push_back(gfx::Rect(0, 0, webViewWidth, webViewHeight));