not-allowed cursor of a disabled field appears in a <select> menu in IE11

Created by: ghost

Consider the following scenario: there's a form with a disabled field and a dropdown list above that field. When you open the dropdown list and move the cursor in the list to the area of the disabled field, the disabled cursor appears instead of the regular cursor you expect when hovering over an open dropdown list. In the case of the screenshot no other CSS than bootstrap.css (3.2.0) was used.

This problem only occurs with IE, in Firefox and Chrome the cursor acts fine. Should I assume this is a bug in IE?