Not sure what this is specific to but it is something I never encountered in any of the previous betas but it is where the game crashes when entering any world generated with the experimental Caves and Cliffs option and it said crashes are to be expected in experimental gameplay but I just wanted to type this issue because I feel it is either specific to Samsung phones and tablets or devices in Android 11 because it is not about crashing when in a certain biome or, touching a block or anything, it just crashes randomly when looking around a world generated with the experimental Caves and Cliffs option. To test if this crash only applied to my Samsung Galaxy Tab S7, I also tried on a Samsung phone the s10e to where the same crash occurs by the same conditions but doesn't happen when the Caves and Cliffs option is disabled. This crash could or could not be specific to Samsung or Android in general I just said it could be specific with those platforms because that's what I generally play and test the new beta features on. Not sure what's the period in which of how quick these crashes occur but they happen around a minute or two. Also this issue suggest it might be cross platform by looking at MCPE-129175.