That’s what I was trying to say. What you described and posted the video about, that used to work for me, too. Now I can’t tap the close button, nothing happens and it is stuck in that black screen. And the same ad comes up more than 90% of the times I try to watch an ad. After a couple of tries, I just simply give up.
And as the others said, I have to reload the game every time this happens, and there is no “report ad” button.
I suspect this is just a plot of Nordeus to make us spend our green packs