Bug: Exiting a post always displays a 'unsaved changes' warning even if there are no unsaved changes.

[bacoords]

I'm guessing we're updating an entity prop somewhere that shouldn't be.

[zaguiini]

Yep: https://github.com/Automattic/create-content-model/blob/d74d16dc6a5e3c946b4ee61016b8ca8260b8797f/includes/runtime/src/hooks/use-fallback-value-clearer.js#L54