Not entirely too sure. I believe we should be going straight to the final update but depending on the bugs you, myself and many other beta testers have reported it could go to a third.
There is a third beta coming out look up on youtube the predictive back gesture is re added on beta 3 and there is a toggle setting where you can turn it off and on depending on your personal preferences thpugh i have no idea when it will be released as public beta?
We are constantly monitoring feedback from Beta community and trying to improve the software as we want the official version to be as bug-free as possible 😊