Sorry, there supposed to be a video demonstration, but unfortunately OBS captured only sound and a static image for a reason. :(
It was supposed to show a worker that refused to claim a perfectly safe area consisted of an enemy tile and enemy Archive. I battled it for about a minute, dropping it as close as possible to the entrance tile. Interestingly, it agreed to fortify walls if dropped near one.
Anyway, whenever a worker goes for 'collecting an item' as indicated by its activity, it's not possible to force it out the activity via conventional means, such as dropping near its designated area. They will always return back to that activity, ignoring even fallen minions a tile away!!!
Customer support service by UserEcho