Chosen Solution
I have a Galaxy S6 Edge and the recent key keeps glitching and jumping screens. After that, the bottom bit of the screen, the back button and the recent key doesn’t work. I’ve tried everything from All in One Gestures to Wiping the cache. I need help A.S.A.P. My phone is becoming unusable. It’s like this person’s phone in this video: https://youtu.be/nocPCRqXXJA
Usually this issue occurs when there is liquid damage in the phone. I recommend taking the phone to a reputable repair shop for liquid damage evaluation.