Hey there. This Bug has been reported since 2014 and seems to be not fixed yet. During the Quest "A Storm Upon the Shore" in Greenshade's Seaside Sanctuary you have to light the beacon of the Lighthouse. When doing so the disguise you are wearing just happens to vanish. So did my disguise - the Servant's Robes. I allredy contacted the support but got only the automized standard answer until now, I allready wrote them back, that I did not accidently delete my favorite disguise but this is a well known Bug. Former reporters usally got help by just restoring the item throught a GM.
With this Post I just like to warn everyone from this Quest and make ZOS aware, that this Bug is still existing (since 2014!) and that I would like to get help, since the Support via EMail does not react to my request.
Greetings
Schnurri