When you click on the help icon (since #4818) related to a dropdownList, the behavior is currently broken. It will display the help text in an incorrect location due to the legacy behavior support added to cover the table2div migration.
If the dropdownList is "closed" (no dropdownListBody displayed), the help will not appear. If the body is displayed, the help of the dropdownList entry will be displayed inside the first entry helpArea instead of the one from dropdownList. (The behavior is the same for both situations due to the body being closed)