1 files changed, 2 insertions, 0 deletions
diff --git a/src/Fl_cocoa.mm b/src/Fl_cocoa.mm
index 915677038..330f23e64 100644
--- a/src/Fl_cocoa.mm
+++ b/src/Fl_cocoa.mm
@@ -1222,6 +1222,8 @@ static FLWindowDelegate *flwindowdelegate_instance = nil;
 {
   FLWindow *nsw = (FLWindow*)[notif object];
   Fl_Window *window = [nsw getFl_Window];
+  // don't process move for a subwindow of a miniaturized top window
+  if (window->parent() && [fl_xid(window->top_window()) isMiniaturized]) return;
   if (fabs([[nsw contentView] frame].size.height - window->h() * fl_graphics_driver->scale()) > 5.) {
     // the contentView, but not the window frame, is resized. This happens with tabbed windows.
     [self windowDidResize:notif];