Problem saving lines drawn using the drawing tools

Since I installed the update version 4.7.9, I encountered this big problem that the lines I draw using cTrader's drawing tool, even after saving the template, suddenly, after some time, are completely deleted. This problem is especially visible when I draw support and resistance levels. Please check the issue and solve it.

Thanks, and kind Regards.

Dear trader,

Can you please provide us exact steps that will allow us to reproduce this issue? If you can record a video as well, it will be helpful.

Best regards,

cTrader Team

screenshots

in the screenshot below, Text boxes did not deleted. but when you zoom in the chart you can see those. otherwise, you can see only Clear box ( shadows of box) ! 

After a few hours, when the chart is refreshed, there is no trace of the lines. I have saved this chart as a template before. When I call the template, there is no trace of lines. too.

PLEASE HELP !

Dear trader,

Thank you for reporting this issue. Could you pleasesend us some troubleshooting information the next time this happens? Please paste a link to this discussion inside the text box before you submit it.

Best regards,

cTrader Team