Hello,
so the app is working as intended. We can't make the lockscreen "unkillable". But we made sure that there's an android lock screen right behind it.
If you set a lock screen yourself, you are protected anyway.
If you don't have a lock screen configured, our geniuses found a way to engage the android lock screen behind the Anti-Theft lock screen anyway.
so - one may kill the Anti-Theft lock screen - but still can't access the device.