Hello Felix,
I crafted a test against Bing.com that successfully implements your solution. If you clear cookies and navigate to Bing, there's a gray banner at the bottom that says "Bing brings search and people together." The containing <div> is:
Clicking the "X" on that banner causes the containing <div> to change:
That meant it was not seen by Test Studio, so the following code succeeded:
If you require further assistance, please provide a public site with a complete code sample so we can reproduce the issue.
Regards,
Anthony
the Telerik team