In the first attached save file, the upper-left thief drone isn't moving to attack, regardless of how long i wait.
This first case resolved after i ordered a drone (i think the one that wasn't moving?) to come back then deployed it again.
In the second attached save file, the bottom thief drone has stolen something, but isn't coming back to me, no matter how long i wait.
This second case resolved when the other drone stole something and returned.
(Sorry, i just realized as i finished writing this report that screenshots might've been useful and would've clarified the situation without the need to load those files.)