A 35 point drop should either be a temporary blip, or a result of having practically no other credit.
A significant portion of your credit score is the average age of accounts. When an account closes, that is no longer accumulating time (this is also why you should just keep credit cards you aren’t using open, and if they have an annual fee, have the issuer change it to a free card if they can, I.e Chase Sapphire down to Freedom).
Another portion of the score is debt-to-limit ratio. If that goes from $250:$10,000, down to 0:0, you look a lot worse as a credit customer.