Superimposed blank area in web interface after close group

We have a web based (WIB) bps application the includes many manual layouts. In order to maintain the compactness of the page, we have put these manual layouts into "Groups" using the WIB "group" object.

We are finding that when running the applicaiton in the browser, upon opening and then closing the group, we are left with a "shadow" or rectangle that is the size of the layout before closing and which subsequently covers up any content underneath it. Using the "refresh" button cleans things up but this is very annoying.

Hase anyone else experienced this problem? Any thoughts?

Thank you in advance.

Andy