That works, whenever the app is closed or in the background. However, sometimes you receive a notification, while you have the app open. In this case, instead of the notification icon we selected, a “Warning Sign” (I added a screenshot) is displayed.
Replacing the corona_statusbar_icon_default.png icon works. Now the right icon is displayed, but it has the wrong background color. To explain, when sending the notification from a backend server, i can choose the background color. It is blue in our case. For the normal notifications it has the blue background, but while the app is open the background is light grey, as it was for the “Warning sign”.
It’s not really a priority, but it would be nice, if that color was used, if it is specified.