Problem when entering a very lengthy text.

[Yasachandra]

I have a popup model on a page in which there is a inputAutocomplete template (which is basically a text input box) in which after typing "@" a list of values appear.
Everything works fine until i type a very lengthy text inside the "inputAutocomplete". Say the number of character that can be displayed by the textbox is 25. Now i type some text "cghchghg..." which is 30 characters long. Then i give a token "@" and the list of required values comes up, but this list is given after giving some space in front of the popup model and not immediately after the model as shown below:

The expected behaviour is this