My Sajan had the following skill feats prior to the bug: Dex +4, Wis +1. After I completed the scenario Scaling Mhar Nassif, everyone gained a Skill Feat, which is ok, because that's the scenario reward. But when I was going to upgrade Sajan's skills, I noticed that his skill feats were altered to Dex +4 and Con +1! I upgraded his Wis again to +1, but I could do nothing about his Con. 

Thanks for pointing this out we'll look into it.

​Do you own the character alt for Sajan? If so have you ever switched to the alt?

​Do you own any other character alts that you have used?

No, Sajan was not equipped with any character alts, and I don't own any alts.