A bug with DW Promobar on mobile phone and tablet view

DW Promobar is a great plugin, but I think there is a bug in it when viewing a website on a mobile phone or a tablet.

The bug is that when you collapse the promobar, except the triangle on the top right side of the screen you can see small colored space (colored boxes) on the top left and right side. The color of these bosex is the same like the color of the promobar. Those colored boxes are quite annoying and they forced me to deactivate the plugin for mobile phones and tablets. 🙁

On desktop there is no such a problem.

I am using the very popular Metro Pro theme and Genesis framework. The problem is tested with Chrome and Android.

I can send you a picture if you tell me how I could do it. Probably the picture will explain better where are positioned those colored boxes.

Please, advise how I could fix such a problem.