Issue #22381: Puzzle in Lost Valkygg - bars lowered on first visit
The bars associated with the pressure plate puzzle will already be lowered when you visit Lost Valykgg for the first time. This allows you to bypass the puzzle which obviously has to be a mistake.
The bars will be reversed every time you revisit the dungeon so it seems like Bethesda got whatever it is that controls the way the puzzle works backwards.
FormIDs for the bars: 00080A97, 00080A98, 00080A99
By the way, I checked my papyrus log and didn't get any errors.