Error Combobox on Ipad

Hi all !
I using Combobox for the project, it is operating normally on chorme and adroid but the error on ios(version IOS 8.4.1).
it can not be opened pupop to select the item . if search pupop is open but do not select item combobox.
I test on demo.vaadin.com but it also do not working.
Please help me !
Thanks all :smiley:

I raised and answered that question
here
. iOS 8.4.1 is indeed broken with ComboBox

please help me fix it