As a warlock and using the Attunement of Grace subclass when you hit an enemy to gain the buff Guiding Flame the buff severely unpairs your vision when aiming down sights with the effect Honed Edge active on Izanagi’s Burden the effect lasts until Guiding Flame wears off or you stop aiming down sights
When Honed Edge is active fast traveling causes the effect to negate and leave 1 standard round in your magazine wasting 3 bullets they are not returned to your reserves
Additionally while in a Well of Radiance aiming down sights with or without the perk Honed Edge active causes player vision to be severely impaired until either exiting the well or stopping aiming down sights
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This is the same as Gambit. When invading, it was so hard to aim due to the light covering the scope.