Season premiere week is pretty much always celebrated in some form or fashion, so it's safe to assume the episode in question is not a part of said week, given the details provided plus what others have said.
Since we don't yet know the air dates for Season 46, I don't think the Hot Seat spoiler is that big of a deal. Just don't reveal the results or discuss any other games that were played in that show.
Also not entirely sure that you're allowed to speak about shows that haven't aired yet?
You are correct. Unless the powers above me feel differently, I see no harm in letting it slide this time, but spoilers such as these are certainly something to be avoided.
Pretty much, don't discuss contestants who were selected, pricing games played, any type of results, etc. Details such as Drew mentioning this being the first taped show of the upcoming season, production and directing mistakes, your overall taping experience, etc. -- those things are generally fair game to discuss.