pressing "End" to move indicator to line-end;text disappears

[Elmir2m]

I use Microsoft Word "Office"
Lately, when I press the keyboard's "End" key to move the cursor to the end
of the line the text vanishes. I can restore it by clicking the manual
control. I did not have this problem till recently.
Is the key-board at fault?
With thanks L. Mirabel

 

[James]

Your Keyboard is ok. There must be something wrong with Word.