After the update that introduced crossbows and shields to MCPE, two of my world chunks were literrally deleted..

Im not sure which version but after todays update (the shields and crossbows update) i entered my og world, and walked over to my iron farm. There is a huge chunk missing from the area that used to be here. Originally the area was never mined and had a forest. I threw a carrot from my farm to my left and the carrot just fell through im assuming this is an open chunk to the void. This is probably not a glitch, as my map shows that these holes are black., like a map in the End would, and mobs avoid the edges of these chunk gaps..