Sleeping in straw beds does not grant the "Sweet Dreams" advancement

This is probably working as intended since the advancement text explicitly states “to change your respawn point“, which straw beds do not do

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After consideration, the issue is being closed as Working as Intended.

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Since this is intended, the advancement's description should be changed to “Sleep in a non-straw Bed to change your respawn point”. Maybe there could be a new advancement called “Not so Sweet Dreams” where a player sleeps in a straw bed…