Unofficial Skyrim Legendary Edition Patch

For completing the Thieves Guild questline and becoming an agent of Nocturnal, you can choose the ability Shadowcloak of Nocturnal. It has the description "For 120 seconds you automatically become invisible while sneaking." As per the wiki:



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Once the power is used, shifting into and out of sneak activates and deactivates the invisibility. Even after the two minutes has passed, the player will still be able to activate and deactivate the power by standing and sneaking. The ability doesn't truly expire until the player interacts with something whilst sneaking that breaks the invisibility spell.
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This seems like a big oversight in the vanilla game. Entering sneak after the 120 seconds has elapsed should probably not continue to activate invisibility. It makes the ability hugely broken, and is not in line with any in-game description of the ability.