BUG

Strange button written in the Standard Galactic Alphabet appears underneath an enchanted book after tapping the UI.

HOW TO REPLICATE

In a librarian villager's trading menu. Tap the UI underneath the Trade button while hovering over an enchanted book trade.

You MUST be:

• Hovering over the trade using the crosshair that appears when using the left stick (controller).
• Tapping the UI underneath the Trade button with your finger (touchscreen).

OTHER INFORMATION

The button translates into English as "DAB".

The button does nothing.

As far as I know, the button doesn't appear on any other villager trades.

You don't necessarily need to tap under the trade button, you can tap on any part of the UI except any buttons or inventory slots.