The adverts that give you a choice between two different adverts almost always fail to end properly, either going to a blank white screen or displaying the no advert available message.
(Galaxy a21s)
And the mike miers advert has no exit. Need to crash out to leave
@Anodine when the screen goes blank, have you tried leaving it for a few minutes? Sometimes ads used to leave me on a blank screen too and then the story would work after waiting for a few minutes.