I had fullscreen ads on unlock with another barcode scanner app - IDK if it was this one or another one, but I remember blaming several other apps before figuri

I had fullscreen ads on unlock with another barcode scanner app - IDK if it was this one or another one, but I remember blaming several other apps before figuring out it was a barcode scanner and removing it. The really frustrating part was that trying to open the app switcher to find out what app this was coming from would also dismiss the ad somehow.