Firstly thanks for such a prompt action on the issue.
I am still facing the problem of search bar not appearing behind the menu (z index issue).
Yesterday after you fixed up the problem everything was working fine, that is the taxonomy input and the search bar appearance were functioning as desired.
But today again search bar (z index) is creating problem. The only change I have done on my website yesterday after you fixed up the problem was updating the security plugin ” Wordfence”.
So request you to please look into it.