Waveform Graph cursor name is flashing on other overlapped window

[AdarshaPakala]

In my application, I have a Base GUI(LabVIEW VI front panel) and I launch 2 more VIs as Window_1 and Window_2.  Window_1 and Window_2 are subpanels on Base GUI.

Due to some requirements it has been implemented such a way that Window_1 and Window_2 can be freely moved within Base GUI region and also Window_1 and Window_2 overlapped each other(panel move and position handling code). A user can drag Window_2 over Window_1 and keep it on Window_1, vice versa is also true. Window_1 has Waveform Graph and Window_2 has some other Boolean buttons controls. The Window_1 Waveform graph is continuously updated with graph data(2D array of waveform data, Probe number 13 in the screenshot) and different cursor points(Probe number 14). Please refer ScreenshotPNG.PNG attached to get an idea how am I writing the data and cursor(sample name for illustration) info. 

It was all working, now all of sudden the cursor name is started flashing(kind of flickering) on Window_2, when we keep Window_2 on Window_1 overlapped. Cursor name is only flickering when graph data and cursor data is written to the graph. In the Flickering.gif you can see the cursor name flickering after I move the Window_1 from left to right to overlap on Window 2.

I have tried setting 'Smooth update' property to true as recommended here but it did not help.

Thank you

Adarsh

LabVIEW from 2006

CLA from 2016

[AdarshaPakala]

Recently I have set Waveform Graphs 'PlotImages' property to draw a vertical line on the graph, will that be conflicting with cursor and could be a reason for the cursor name flickering ?