I'm using a SG3 on Sprint with rooted stock JB. Figured out my "WTH your phone took control" errors. It would work okay for a few seconds to several minutes but wasn't predictable. Wireless optimization was off. I couldn't find any other apps to worry about so went back through settings.
Disabled: Settings->Location Services->Use wireless networks
Bingo. No more WTH errors.
The longer connections showed one more source of problems, when I have to wake up the display after it dims. Pressing the power button wakes the the display with an immediate WTH error. Extended my display timeout and all is fine.
Thank you TrevE!
Which version of the app is working for you? I'm using the 11/18 and it works but it just doesn't seem "solid".