It seems that the most recent update of Animal Crossing: New Horizons, version 1.5, has also included a glitch along with the autumn and Halloween news. This has been notified through the franchise’s official Japanese Twitter account.
According to what was shared, it is an error related to the miles Nook
He adds that they are already working to find a solution and update the game by correcting the error. Also, Nintendo has already fixed another bug with the update 1.5
In addition, we have received many inquiries that “you can no longer order posters of animals that you have obtained once at Tanuki Shopping”, but here we ordered posters other than animals that you have invited to the shooting studio. This is due to the correction of the problems that can be made, and the operation is normal.
— Animal Crossing (@doubutsuno_mori) October 2, 2020
We will be attentive to see when the correction of the new detected error is launched.
なお、「いちど入手したことがあるどうぶつのポスターを、たぬきショッピングで注文できなくなっている」というお問い合わせを多数いただいておりますが、こちらは撮影スタジオに招待したことがあるどうぶつ以外のポスターを注文できる不具合を修正したことによるもので、正常な動作となっています。
— どうぶつの森 (@doubutsuno_mori) October 2, 2020