I use nova launcher and im finding that all too often when typing i accidentally press a capacitive button which can end up getting really messy.
I have found a solution to this. Basically just download the Button Mapper app then re-programme all three capacitive buttons so they can only be activated with a long press.
It does take some getting used to but it is a solution
I am experimenting with the delay timing so i can find the optimal setting. At the moment i have it set to a 300ms delay.