Was just preparing a REPL about the same problem:
Throws "item is not defined" - seems to happen when using {{else}} inside {{#each}}. If the {{else}} is removed, no error is thrown.
Works fine with 0.55.
It _looks_ like the issue is right here (and also right here). The code is attempting to use values from state without actually retrieving them from the state object. I'm taking a peek at this, but all of this code was heavily refactored for 1.56.0 and so I'm not very familiar with it yet.
Fixed in 1.56.1 — thanks all
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Fixed in 1.56.1 — thanks all