Every time I enter or exit a building, the client disconnects, and throws me back to the login screen. After I login back, there is a black screen instead of a terrain (all objects are shown normally in ender, in standard client it just says "loading..." for eternity). As of now, the only way to fix it is to login back to my hearth fire.
This is strange, because it never happened before, but just started to happen at some point, and now it happens each time I enter or exit my house. I tried both with Ender client, and with standard client "autohaven.jnlp". Also I tried to run standard client on a different machine, and it happened anyway.
Very annoying, and I don't know what to do to return back to the state when it didn't disconnect... Any ideas? Also, if I should provide more information to pinpoint the problem, just ask, I'll do my best to provide it.