Stock 5.1.1 killing apps that should be persistent

Updated to stock 5.1.1 on my note 4 n910u variant last week, and I noticed that it kills apps that are suppose to stay in memory,like Adguard or pintasking. This was not an issue on 5.0.1 and I'd like to know if anyone has observed this.

I'm not running any task killing apps or Xposed modules.

Sent from my SM-N910U using Tapatalk

Persistent notifications on notification panel.

I use screebl, I know there is inbuilt things to do it. I just find screebl to work better. But does anyone know how to remove screebl from (see picture) but keep it in the top notification as I use it to tell if it's on.

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