So I moved to RC1 from Beta 11 recently, and out of the many things which broke, there’s a 100% replicable bug which is a pretty big deal breaker - move in between pages (page 1 -> push to page 2 -> back -> push to page 2 -> etc) and eventually you get to a black screen which kills the app.
Of course, the reason why I found out about this was from navigating normally and not going back and forth repeatedly.