Books of Mending or Frost Walker can not be found in treasure chests

I searched hundreds of trunks of various structures and none of those chests had the patch spell or frozen steps.

HOW TO REPRODUCE?
It's simple, you just have to create a new world in version 1.1 beta 1 and look for the new spells in chests of structures if you never find, then the bug is confirmed.

WHAT SHOULD YOU DO?
Chests of dungeons, spawn mob chests, chests of desert temples, chests of jungle temples, chests of nether fortresses

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