Minecraft chunks are not loaded?

I have a problem with me since this morning that the chunks only load when I join my server again. But that is somehow only in the lobby in the main world. If I go to another world or subserver, the chunks load.

I have tried it with another PC and there it went.

Have you ever tried to go to the uncharged chunks?

Make a stand Textures package in and then out again.

Yes I have. I have already tried other TP and even other version.

Oh OK, I can't deliver more than the standard tips.

OK, too bad.