Hi!!
I've created a differente banner for each activity i have on my app.
The problem is that, when i try to show it on main activity, it works perfectly, ads are received and viewed on the banner. When i do the same, changing the id for the right ad block) it raises the ad_received sub, but it does not shows the ad... ad id's are right, because, if i swap any of them with the one of the main activity, it also shows ads
Just to try. Perhaps you are adding some other opaque view/panel to the other activities that by mistake cover this ad area? You could test it with a void activity that doesn't load any other views