In certain areas of in my 1.17 "old world" type bedrock world, there are areas of water that do not let you  jump out even when it is only 1 block high. Crouching will not keep you from falling off whole blocks. And slabs and stairs act like whole blocks, forcing the player to jump up them to maneuver. This only occurs in certain areas of my world while other areas remain unaffected and work like normal.