diff --git a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
index 2158b1a1..f3849b99 100644
--- a/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
+++ b/pyqtgraph/graphicsItems/PlotItem/PlotItem.py
@@ -563,8 +563,8 @@ class PlotItem(GraphicsWidget):
         if item in self.dataItems:
             self.dataItems.remove(item)
             
-        if item.scene() is not None:
-            self.vb.removeItem(item)
+        self.vb.removeItem(item)
+        
         if item in self.curves:
             self.curves.remove(item)
             self.updateDecimation()
diff --git a/pyqtgraph/graphicsItems/ViewBox/ViewBox.py b/pyqtgraph/graphicsItems/ViewBox/ViewBox.py
index 6c6e3718..9c71d7db 100644
--- a/pyqtgraph/graphicsItems/ViewBox/ViewBox.py
+++ b/pyqtgraph/graphicsItems/ViewBox/ViewBox.py
@@ -399,10 +399,12 @@ class ViewBox(GraphicsWidget):
         """
         if item.zValue() < self.zValue():
             item.setZValue(self.zValue()+1)
+            
         scene = self.scene()
         if scene is not None and scene is not item.scene():
             scene.addItem(item)  ## Necessary due to Qt bug: https://bugreports.qt-project.org/browse/QTBUG-18616
         item.setParentItem(self.childGroup)
+        
         if not ignoreBounds:
             self.addedItems.append(item)
         self.updateAutoRange()
@@ -413,7 +415,12 @@ class ViewBox(GraphicsWidget):
             self.addedItems.remove(item)
         except:
             pass
-        self.scene().removeItem(item)
+        
+        scene = self.scene()
+        if scene is not None:
+            scene.removeItem(item)
+        item.setParentItem(None)
+        
         self.updateAutoRange()
 
     def clear(self):