Why does my my LG G4 randomly uninstall apps?

[MELSCH66]

My LG G4 randomly uninstalls apps and I have to re-download them, even if they are paid apps.  It also has trouble connecting to mobile data sometimes.  I can turn it off and on and it will usually reset and be okay, but I shouldn't have to do that every time.  Has anyone had these problems?

[LENNYEDGE]

IT DOES THAT TO ME TOO on my edge brand new. i say its a permission issue with security

[sageorama]

Did you use Smart Cleaning? Unfortunately if you select Idle apps to clean, it will delete them.