Operating slow

[AC Question]

I recently bought samsung 6 and every now and then the back and tabs button flash randomly and the operating system slows way down to the point where I have to type anything very slow so it can keep up I have a security app why is it doing this??

 

[belodion]

Does it do these things in Safe Mode too? https://forums.androidcentral.com/showthread.php?t=409154