[Q] Task switcher takes 2-4 seconds to open on 5.0 Lollipop SM-G900F topic

I flashed the polish Android 5.0 lollipop on my SM-G900F Galaxy S5. I have the latest xxxBNL9 update. When i hit the task switcher (left) button it takes very long to minimize the screen and open the task switcher. Typically it takes 2-3 seconds. When i do it repetitively it goes quicker. I've already set the "transition animation scale" to off in "developer options". Frequently closing all apps also doesn't help.

Please help me. I multitask a lot and this delay is very annoying.