Add the “Find Space” portal section to a portal. The portal that I used was “Home – Application Builder Portal”. Sign in as a user with that portal. In “What are you looking for?”, select Building. For the Building field, select the search icon. The issue is that only part of the popup displays the list of buildings and you cannot scroll it to see the left side.
As a temporary fix, maximize the portal section. We needed to add logic to adjust the width of the popup when it is displayed inside a portal section. Moving forward, the width of the popup layer will be automatically adjusted when it is displayed inside a portal section.
[Admin: A similar article is also posted in the IBM Support Portal.]