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When using the pickblock on the redrock slabs (all of them, red cobblestone, red rock, and red brick) the command does not return the correct item into your inventory. Instead it returns different types of slabs like wooden, stone, and sandstone.
Staff have suggested to add a day and night cycle to the project world. This should be offset from the survival world so that it is daytime in the project world when it is night time in the survival world