The ‘lamps’ you attack after clearing the area of electric turrets was unattackable but still targetable. No area attack nor single target or homing ability would affect it.
So, 12 minutes in, after a majority of our group finishing the remaining locations, we get the bright idea of guesting to do the puzzle and then return to our home server to click the guild trek insignia, and by the time we found a server that had it properly working, it was too late to complete the puzzle.
Likely going to have to park a character there before every trek until this is fixed.
Finally I recalled the stopgap solution of a great princess who was told that the
peasants had no bread and who responded: “Let them eat brioche.”