Presently, one needs to use chunky world <world> to change to the current world (unless the current world is world). This is rather non-intuitive. Please consider making the active world for all commands the current world, unless it has been explicitly set with chunky world <world>.

See related Chunky feature request: pop4959/Chunky#53

Thanks again for the feature request, although unfortunately I will be closing this for the reasons described in the linked issue.