In our App, we use AdMob for mediation and include with it ads from AdMob, Amazon and Facebook. A release build for Amazon installed from Android Studio, running on Amazon tablets shows banners and interstitials from AdMob as expected. The live version download from the Amazon Appstore will show Facebook ads but no AdMob ads whatsoever. AdMob reports indicate these have stopped completely. This appears to happen since the recent change to the Amazon App submission signing mechanisms. We are losing significant income here and a resolution would be much appreciated.
An App build will show AdMob ads, when this same build is submitted to Amazon and installed from there, AdMob ads do not work.