(I don't found an issue to my bug, if there is one, please can you send me to it)

My map isn't broken, I'm sure.

But when I go somewhere in my world, the chunks don't load and if I want them to load, I must to quit my world and re-launch it. it's worse when we are two in my world. and when I go ''in'' the chunks, an ''invisible wall'' stop me.

I put 1.4.0.5 but it's this since the last update before.

(I do some video but they are too heighty to put them here, so I try to cut one of them to show you exactly)