In Minecraft Bedrock Edition version 1.26.0.2 on Android, villagers can successfully take the Librarian profession when a Lectern is placed nearby, but the trading interface shows no trades.
The Librarian correctly links to the Lectern and changes profession, however the trade UI appears completely empty.
This occurs during daytime, in new worlds, and after reloading the world.
The villager has access to a bed and the workstation.
Expected result:
The Librarian should display normal trades (books, paper, emeralds).
Actual result:
The trading interface is blank / empty with no available trades.
Please attach a screenshot.