lsp-ui breaks C-x 1

[davemilter]

When I start emacs (GNU Emacs 28.2) all functionality of frames works fine.
I can split frame by two via "C-x 3", switch to the right "C-x o", and then close other (left) frame via "C-x 1".

But after I activate error frame on the bottom via pressing with mouse on error counter on the status bar (see screenshot bellow),
and then close error frame, then "C-x 1" stops working. I still can use "C-x 3" and "C-x o", but "C-x 1" inside the right frame do not work anymore, it works only inside the left frame.