When completing a quest in a cave on the first level, the game does not see the completed part of the quest to activate power plants. For example, my game first counted the activation of the second power plant, and after I activated the passage to the lower level and defeated two robot guards, it required re-activation of the already activated station.
Quest - Ancient Caves: Barren Climate , Restore Power to the Zant: Barren Climate - Station 2 .

Screenshots:
https://steamcommunity.com/sharedfiles/filedetails/?id=3325636086
https://steamcommunity.com/sharedfiles/filedetails/?id=3325636131