The Minecraft flat map bug, which I knew to be a bug patch in 1.3 Beta, has been updated to 1.7.1 and this bug has been resurrected again and again the bug that caused the flat map chunk to crash is again serious. Especially on Windows 10 Edition. I think this is not good, and the patch is too urgent. It seems like you have not completely fixed the flat map bug yet, please remove this bug completely in the next update version.