Sometimes, when i'm walking around in the world, some chunks do not load. they are physically not there in the game. Some water source blocks spawn sometimes, floating in the air in these unloaded chunks, but they do not spread. The chunks that do not load form a straight line. If i jump off, i glitch back up onto the chunk i jumped off, or i get stuck glitching back up after falling down about a block. it has the similar effects of a slow falling potion. This may be a local problem, as i was playing on a LAN server with my cousin and he only had problems when i joined. This happens in all gamemodes.