Game crash when loading new chunks.

I open one of my map, after loading, I can get into the world normally. But when moving with a high speed such as press w on the keyboard twice ,the game crash down.

I have reported a crash bug of android platform few days ago but I cannot figure out the reason which lead to a response of invalid report, so today after update I tried again on my android platform. The game crash everytime when loading worlds.

So I tried to get the visible chunk area down, on both android and win10, which lead to a success loading the world, then I scale up the loading area with no crash. This is strange.

I think maybe it is a problem of system scheduling when loading worlds.