Board Thread:Skyrim/@comment-106.68.189.56-20150406012119/@comment-25948162-20150406091824

Not only merchants, but even normal houses are relocked. Another thing to consider is that opening doors and containers with a key doesn't give you experience, so having this perk will hinder your levelling of the lockpick skill in the long run because you cannot pick a lock again after it resets and you can't drop keys. If you hate lockpicking get the perks that make the process easier or even the perk unbreakable, otherwise just carry some light fortify lockpicking items like a ring or a necklace.