I remove the weed area and rebuild again, the worker did not go to work but just will stand at there status shown finding things to do, but if I change the type of work and change back, the worker will go work. BUT MOSTLY the worker will continue status shown finding things to do after I change back the type of work.

This happen not only just on weed area, sometime I pause the time and build something, the weed area worker will having the status shown finding things to do, and stand there doing nothing, but when on break time will go take rest.