We rerender the rich:dropDownMenu when checkboxes on the page are selected. Some menu items may be disabled and some may be enabled depending on which checkbox is selected.
1. When the rich:dropDownMenu is rerendered, sometimes it is rerendered after the menu is displayed. Ex: When you mouse over, 2 items are disabled. After a second, 3 items are disabled. I set the hideDelay and showDelay to 0. I can still see the menu blinking twice.
2. Sometimes the menu does not get rerendered at all. I see the old state of the menu items.