This is a screencast that shows the issue we are having. I think its an issue with the SugarCRM/Backbone event structure (maybe an issue starting in clients/base/views/selection-list/selection-list.js) but support closed our case. So here we are begging for help.
Basically the issue is that no discernible event is fired when you select a related record from a list using the "Search and Select" link.
If you type in part of a name and use that, an event is fired but not if you select from a list.