Thread:SuperSarcosmic/@comment-2001:A61:BED:6701:A1C5:30D6:CC68:1CC1-20190427180137/@comment-38109392-20190427235701

Hi! This is a known bug, you can see some of the other known bugs in the bugs section of the page. This is what is currently on that page regarding this bug: "Leaving WOW Industries before completing The Poisoned Water can result in the player getting locked out. However, it is possible that the player may be able to re-enter from an invisible access point to located slightly to the left of the WOW Industries entrance, as shown here."

If you reload the day that you fixed the pipe and do the entire dungeon without exiting, you should be able to avoid the bug. It doesn't matter whether you do Mission: The Poisoned Water on the same day that you loaded or a later date since this mission has no time limit, so you can go ahead and prepare better.