User blog comment:AlphaDogMJP/Generations: Sneaking Glitch?/@comment-1997588-20121027044337

Yeah, this glitch happened to me too. Unfortunately, I played a big family with lots of teens at that time, so I didn't pay enough attention when the glitch eventually fixed itself. Although I did recall that until she grew up into an adult the glitch has gone, there's some point when it's already gone at her teenagehood.

Perhaps I couldn't help much technical assistance, but perhaps a mod can fix it or you can ask someone else over ModTheSims for help?