Global and Alliance chat dont keep history.

If you have a base window open, the chat window will not expand and overlap with the base window. Chat will only expand if the base window is closed.

Wait, what we mean by base and main window? :) I mean window in the middle. And chat expanded and active as I login in.

Yes, main window and base window should be the same.
Have you noticed any pattern so far when the chat window overlaps and when not?
I'm not sure how to reproduce this. Your browser is Chrome?

Its like with 2% cnahce chat not active when I login in :)

Firefox.

What about adding setting, which closing chat by default?

Maybe a setting which you choose, but not a default setting as it would mean the majority of players having to open v a minority wishing to close it. Is it really so much of a chore to close it when you've logged in?

You can make vote or something like that :)