In an unusual incident, the Progress 38 resupply capsule from Russia, flew by the Space Station instead of docking with it.  The huge capsule was supposed to deliver 2.5 tons of materials to the station.  A second attempt a few days later was successful.

UAVs do occasionally have issues with communication or control, though most of the time failsafe devices enable the safe return of the vessel (or at least its safe destruction).

UAVs are becoming more ubiquitous, however, as more people are persuaded of their generally safe record.  If there are still concerns, however, with the “mishap” involving the huge “space UAV,” perhaps nano-UAVs the size of a hummingbird or smaller would be more comforting.