diff --git a/source/frontend/patchcanvas/canvasbox.py b/source/frontend/patchcanvas/canvasbox.py
index 57198d984..654c141fc 100644
--- a/source/frontend/patchcanvas/canvasbox.py
+++ b/source/frontend/patchcanvas/canvasbox.py
@@ -612,6 +612,10 @@ class CanvasBox(QGraphicsObject):
         QGraphicsObject.mouseDoubleClickEvent(self, event)
 
     def mousePressEvent(self, event):
+        if event.button() == Qt.MiddleButton or event.source() == Qt.MouseEventSynthesizedByApplication:
+            event.ignore()
+            return
+
         canvas.last_z_value += 1
         self.setZValue(canvas.last_z_value)
         self.resetLinesZValue()
diff --git a/source/frontend/patchcanvas/canvasport.py b/source/frontend/patchcanvas/canvasport.py
index d308c92fa..f45181bc7 100644
--- a/source/frontend/patchcanvas/canvasport.py
+++ b/source/frontend/patchcanvas/canvasport.py
@@ -147,6 +147,10 @@ class CanvasPort(QGraphicsItem):
         QGraphicsItem.hoverLeaveEvent(self, event)
 
     def mousePressEvent(self, event):
+        if event.button() == Qt.MiddleButton or event.source() == Qt.MouseEventSynthesizedByApplication:
+            event.ignore()
+            return
+
         if self.m_mouse_down:
             self.handleMouseRelease()
         self.m_hover_item = None
diff --git a/source/frontend/widgets/draggablegraphicsview.py b/source/frontend/widgets/draggablegraphicsview.py
index 57b9ff5ce..1aaa790e7 100644
--- a/source/frontend/widgets/draggablegraphicsview.py
+++ b/source/frontend/widgets/draggablegraphicsview.py
@@ -119,7 +119,8 @@ class DraggableGraphicsView(QGraphicsView):
         if event.button() == self.fMiddleButton and not self.fCtrlDown:
             self.fPanning = True
             self.setDragMode(QGraphicsView.ScrollHandDrag)
-            event = QMouseEvent(event.type(), event.pos(), Qt.LeftButton, Qt.LeftButton, event.modifiers())
+            event = QMouseEvent(event.type(), event.localPos(), event.windowPos(), event.screenPos(),
+                                Qt.LeftButton, Qt.LeftButton, event.modifiers(), Qt.MouseEventSynthesizedByApplication)
 
         QGraphicsView.mousePressEvent(self, event)