AnkiMobile automatically shows the transcription on my notes

On the left is a correctly formatted card on desktop. On the right is a card from the same deck on mobile. As you can see, it automatically shows the transcription (pinyin). How can I disable this so the mobile cards are consistent with those on desktop?

Your deck appears to be using add-on specific code. If you change hint_transcription: to hint: in your card template, it should function on all platforms.