Hey, so as you may know this is a really old bug that existed since the original 2011 skyrim release and only concerns the 3 Blackreach Great Lifts: When you try to use one of those lift, you hear the lever activation audio twice (which is already weird) and then either it works correctly, or you get stuck in a loading loop (eg you see the surface for one second, then it start a loading screen again and again forcing you to exit the game by force)
however this bug can be quite random depending on the performance of the Papyrus scripting engine
Back then on my shitty laptop it would happen 99% of the time, today it can still happen rarely but for players with worse computers it's much more frequent
So i took at look at it and it turns out that it was an error on the script Bethesda created for handling the powerup/powerdown state of those lifts that triggered a double activation which depending on the performance could cause the bug described above
so i removed the double activation, and moved the activation of the lift to the button script and now all works perfectly
the esp and scripts ofc includes the changes made by the USSEP and the sources script are included too

Attached Files:
blackreach great lift fix.rar