I am using NetBeans for PHP development, and I noticed this unpleasant behavior:

First I start typing in a function name that I want to call (| representing the text cursor):
file_get_contents|
Now I see the PHP Platform documentation just fine. But when I now enter the agruments parenthesis:
file_get_contents(|
or
file_get_contents(|);
the documentation closes. If I call it with CTRL+SHIFT+SPACE it comes back for "ibase_blob_get", no matter what functions arguments I'm in.
This behavior makes the code documentation pretty much useless as when one needs the information, it's wrong.

I know I can get the documentation back by hovering the function while holding CTRL, but that prevents me from typing.

To clarify: This behavior obviously occurs when using already declared functions and not when declaring a new function.

So my enhancement request is:
Display the proper code documentation when the cursor is inside the arguments parenthesis. And make it stay when I type in the "(" after the function name.