Yes I see the annotation on the screenshot, but sorry but don't see it when I display the chart

Maybe you could you print out on the screen the annotations you want the chart to display just just before (code wise) displaying the chart? Then we could see if there is a difference between Lahore & Montreal on what JS charts is being set up with. You could run it on your system, and then I could screenshare with you & you could see what is happening here.