Thank you for contacting us about the issue. Could you please provide a running sample (AppBuilder project) that reproduces it? If this is not possible, please share the exact steps we need to follow in order to replicate the faulty behavior on our side. Also, we will need to know if you are running the application on WP8 or WP8.1 device.
Thank you for the help in advance. I am looking forward to your reply.