# Why are the FairPlay license and certificate being requested again on iOS after ads?

The DRM license and certificate are retrieved when a DRM-protected stream starts to be played. This is usually enough for a full playback session since in most cases the DRM context can be maintained.<br />However, certain combinations of features may prevent this.

The most common case is when we indicate that on iOS browsers the native fullscreen should be used (`allowNativeFullscreen: true`). In this case, on these browsers ads and content will be played through the same `<video>` element, regardless of whether the user is actually playing in fullscreen.

This means that when a midroll is played, the previous DRM context is lost, so upon resuming content playback it must be re-established and the DRM license and certificate need to be requested again.