S4 I9505 lockscreen wallpaper resetting

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http://forum.xda-developers.com – Done this twice to me now, I put my own lockscreen wallpaper on but after the phone been shut down a while it reset's back to the default lockscreen wallpaper, also have to reselect touchwiz launcher aswell, this is on MDM firmware. Anybody else suffer from this bug? (HowTos)