There is a problem in adjusting brightness on my lg k7

When I adjust brightness of my lg k7 it causes uneven operations.it automatically open applications , scrolls down notification bar, locks the screen , even it makes calls. The touch system won't work until I turn it off and then turn on the phone.How can I fix the problem?

Welcome to Android Central! How are you adjusting the brightness? Using the slider in the quick settings menu? Are you using Adaptive Brightness?

Does this happen in Safe Mode as well? https://support.t-mobile.com/docs/DOC-30604