Index: sources/gui/qml/components/BaseChart.qml
===================================================================
diff -u -rf9133f0e1044c4ab68291eca66cd88f0a2c8a9b4 -r202faeb56449f895fb52099c14afdd2621137543
--- sources/gui/qml/components/BaseChart.qml	(.../BaseChart.qml)	(revision f9133f0e1044c4ab68291eca66cd88f0a2c8a9b4)
+++ sources/gui/qml/components/BaseChart.qml	(.../BaseChart.qml)	(revision 202faeb56449f895fb52099c14afdd2621137543)
@@ -89,10 +89,7 @@
         _xAxis.min = new Date(_xAxis.min.getTime() + hourMs)
         _xAxis.max = new Date(_xAxis.max.getTime() + hourMs)
 
-//        removeOldPoints()
-        _line1.removePoints(0, vMin)  // remove in batch
-        _line2.removePoints(0, vMin)  // remove in batch
-        _line3.removePoints(0, vMin)  // remove in batch
+        removeOldPoints()
     }
 
     // remove points old left of the window that are not shown