Since update 1.15, can no longer use pools of water to sprint-swim into end portals (where you create a shallow trough of water adjacent to the ELEVATED end portals). Three different people tried at 3 different elevated end portals. Ender pearls still work to enter and exit. These were existing end portal troughs and this method no longer works. By the way, one of the players was playing on X-Box, and 2 were on IOS.