I've been having issues since beta 1. When going to the home screen from another app, and I try to open a new app, it keeps opening the previous app I was on.. Super annoying as it can take more than 5 tries to open the right app
One thing to realize is that these betas are designed for testing with One UI alone. It wasn't until 3.1 when the support for navigation gestures on 3rd party launchers came to us, that was an enhancement that came to a security update. I'm guessing after the official release, the feature will be added back.
Oddly enough it's working fine for me both in beta one and this new release that just came out. I don't have any problems with gesture navigation from the bottom of the screen, using Nova launcher. No issues.
The home gesture doesn't work for me, but the back gesture does. Worked fine on beta 1 with no issue. Edit: tried with hyperion and lawnchair and have no issues.