Just jumping in to confirm this is still a bug/issue in v5 ACF Pro.
I have multiple instances of acf_form() in different tabbed content areas via jquery-ui-tabs and the location field/group only works when it’s in the first tab.
It’s annoying, but i’m glad i found this thread.. I spent almost 2hrs trying to find out why it wasn’t working.
Anybody find a solution to this?