So this isnt exactly what it used to be but I hope itll help a little. Go to the Galaxy Store and download "Good Lock" and install the task changer. Mess around until you find something that works a little better for you. I agree we shouldn't have to find work arounds for our thousand dollar phones but it is what it is for now. They also make an app called "Edge Touch" where you can customize the touch on parts of your curved screen to prevent accidental touch when reaching across the display.
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I actually have the opposite issue with the navigation bar. I saw they came out with their own version of gestures in the new update and decided to give it a try for a week or so. I then went back to the buttons because I just preferred them. Now for my job, I constantly switch between apps and I love the super quick double tap to go back to the previous app thing. Unfortunately, after switching to gestures, my navigation bar stays hidden until I swipe up from the bottom which slows me down just enough to ***** me off. After using gestures, I have absolutely no way of making my navigation bar stay visible at all times like it was when it first updated! I contacted Samsung support and they just recommended I do a full factory reset which I'm not going to try since I have so many preferences set up to keep my phone to my liking. So hey, maybe if you do what I did, you'll be able to get your hidden nav bar back! Also, everytime I swipe up from the home screen to try to get my navigation to show up, it opens Samsung pay -_-
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