Freeze at sleeping screen

[AC Question]

Hello.. i have a problem with my samsung a5 2017.. when the screen goes black(when its not use) or when i lock it and goes to black screen or sleeping screen, sometimes its freeze and cant be move.. so i have to restart it with power and volume button.. but when i use it.. it doesnt have any problem.. so i have to play spotify all time so the screen dont go black or sleep so i can unlock my phone without need to restart it.. any solution for this problem? Thanks

 

[B. Diddy]

Welcome to Android Central! Does this happen in Safe Mode? How do I use Safe Mode on my Galaxy A5? If not, then it's likely something you installed -- you may have to uninstall apps one by one until the problem goes away.