I had a few existing scratchcards in my inventory (did not buy a new one, just old ones from bathhouse/etc), but when I go to scratch them nothing happens. I click "scratch" and the page reloads.

It doesn't appear to be consuming the cards. No error message or anything given.

Edit: I spoke too soon, it's eating the cards for sure. They still show on the dropdown on the page, but are gone from your inventory after you navigate away.

Edit 2: I navigated back to the page and had a game in progress for the first card I attempted to use, but not the second. That one appears to be just gone and even with the first one being saved the page is still not behaving correctly.

The second one never showed up (I just checked the page again to be extra sure). I know it's only supposed to let you scratch one at a time, I only tried to scratch a different card because it at first seemed like the page wasn't working/scratching the first one at all.

I went to the page, hit "scratch", the page reloaded with no change to the list of cards on the drop down menu. So I tried scratch (on the same card) again, same result. Then I tried a different card, same result (page reloads, same cards listed on dropdown). I had to navigate back to the game page (after noticing the cards were actually gone from my inventory) to even be able to successfully scratch the first card.