Hi, I had the same problem as both of you. I fixed it after root by installing titanium backup, and uninstalling the "tethering manager" after backing it up. This also has solved my problem of the hotspot crashing after enabling it.
You can freeze it instead of uninstalling it too, if you have the pay for version of titanium backup. I would post an outside link to the instructions I used, but I don't have enough posts.