O365 Admin Security Groups search bar missing when editing group members

Hello:  per recommendation from my Office 365 Support Ambassador [Case #:25531764] I am reporting a bug on the "View all and manage members" screen in the Security Groups. There used to be a search bar, which is now missing, that allowed me to search for a specific group member. Without the search bar I am forced to scroll through hundreds of user accounts (not in alphabetical order) to find the one I'm looking for.