The Mandragora disappears if I leave the area; the bee knight does not. I even made a nametag and labelled one Punkin 'cause she had a pumpkin skirt. But when I returned from a trip to the Nether she had disappeared from the fenced off garden.

Discord discussion reply from Ancient_Spirit

oh no did we forget to set the perssistent tag? yes we did
hmm it also seems that the mandragora doesn't remember it's type...
Thank you for reporting this is definitely a bug

update coming in a min :D

awesomeness;
now you have a mission complete button :)

This should be fixed in feywild 2.0.2