I was opening Perils in Paradise packs and when I got to the last 6, every time I tried to open one, it instead doubled or tripled the number of Perils packs that I had remaining so it would show 12 or 18, then 36, etc. Exiting the pack opening screen and returning produced the same result. When I exited hearthstone, the 6 packs vanished. I suspect they are the 6 packs from the recent event which I received upon logging in today since I hadn’t collected them.