Behat / Selenium - Element is visible but not visible for testing framework

I am not sure is it Behat or Selenium issue, but on Google's account page where user can manage and remove connected to account apps - I can not actually delete one with Behat, because it thinks that elements in dialog confirming removing are invisible.

The page is here: http://ift.tt/1eqYIE7

If you have any connected to your google account app (like Quora or anything else) click Remove you will see confirmation dialog, it has button OK in it, I can select this element with Behat, but $el->isVisible() returns false.

Do not know what to do. Any ideas?