Why are people so quick to blame their own failure to seek out solutions to problems on Nehrim? Here's a hint - if it's not working, you probably missed something. Unlike Oblivion, Nehrim is not a buggy mess. And Oblivion isn't exactly a buggy mess, either. Besides, if it really is a bug, wouldn't it be better to report it in the actual Nehrim topic? You know, the one delegated to discussion of the mod?
As to resetting "triggers" - I'm quite sure there isn't one. If you want, you can just cheat and "open" every obstacle using the console. It'll leave you feeling cold and empty inside, but at least it's easier than looking around a room twenty times because there might be a second switch.
Nehrim has multitudes of bugs far far far more then Oblivion ever had -> I have run into bottles that did not get enabled when they were suppose to, dungeons that once you got to the second level you could not go back to the first because it crashed the game 100% of the time I had to transport myself out and had to look in the CS and use the console to forward the quest so it would stop crashing -> I found serveral quests that the instant I did them every save game I created after were all corrupt but if I skipped it the whole game went on happily -> at least until I found another bug that is -> Nehrim is the most bug ridden mod I have ever touched by far, and I have yet to finish the main quest because everytime I get to the Library Of Treomar the game randomly crashes from putting the stones on their pedestals or if I can actually get the game to not crash and not create a corrupt savegame the second I talk to the guy in the center its gameover either the game crashed instantly or I kill him and every savegame after that point is corrupt.
and it is a problem with Nehrim causing the corrupt saves because in all my time with Oblivion I have had only one corrupt save and that was caused by MMM -> 4 years 1 corrupt save from a mod VS Nehrim where I get corrupt saves constantly from nothing but doing quests and quest stages, that mod is bugged to hell period !