Cursor scolls upward, if I add a word to a longer text

[j&b]

I have a text, which is longer than 1 display screen page (60 lines).
If I want to attach 1 word, the current line disappears, because the text scrolls back.
The cursor appears now further above and the end of the text (where I want to add text) is disappeared (under the border of the screen (text) window).

What’s that, Sergey ?

[j&b]

It is a inserted text (from word).
If I (!) write a new text, there are no problems. But if I add a text (from word) and add a word there is a problem (cursor scolls up an I can't see the line where I want to add a word).[/list]

[Sergey Tkachenko]

Please give me step-by-step instructions how to reproduce this problem.