Over time, and for a number of different reasons there has been need to issue Errata on existing cards.
Errata is never done to adjust the power level of a card. It is done if the card does not work as intended by its current wording, or its current wording causes it to not actually function.
Eventually the Errata listed here will find its way into a documented housed off of the main UFS Support Page .
Any Errata that has not been officially published will be located in this thread.