Thanks for being with Samsung and sharing your concern. We would request you to download and install Good Lock feature from Galaxy Apps. In case, if it is still not working, kindly provide logs/video within 15 minutes of issue occurrence by registering this feedback in Error Section (Samsung Members App -> Feedback -> Questions/Errors -> Create -> Error reports). Be sure to hit โก when you find an answer that works for you.
For further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/