Hi, I am new to this forum. You guys are my last hope, so please reply to me. I have a really huge Minecraft PE world, where I built a big city. I made a copy of this world and tried to play it in the new MCPE 1.2 beta. But this world lags as hell in this version. I turned fancy graphics and all of this stuff off and turned the render distance on 4 chunks. But the lag is still there. I also have a good device (Samsung Galaxy s6 edge, Android 7.0). Yesterday, I tried messing with the db files of the world and then I noticed a strange folder in the db folder. The folder has the name lost and in it are 3 .ldb files and one MANIFEST. I tried to put these 4 files into the normal db folder, but after I played this world, the files are gone. So does it mean that there are broken or lost chunks in the world? But I can tell that there were no chunk issues or something like that in the world. But now I don't know what I can do to fix the lag (or does it only lag, because of the beta version?). As I said, you are my last hope, so please reply to me, because I don't want to rebuild the entire world. Or is there someone who has the same problem? If you want, I can send a world download link.