ui-select2 component broken by jquery-rails v4.0.0 gem update

[colinvella]

I recently ran a "bundle update" on a project I'm working on and this broke the rendering of the ui-select2 dropdown component. After an extensive trial and error session I pinpointed the problem to jquery-rails updating from 3.1.2 to 4.0.0. For the time being I solved it by binding the gem to a specific version as in:

gem 'jquery-rails', '3.1.2'

I don't know if this is an issue with ui-select2 (the related gem angular-ui-select2-rails hasn't changed in the update AFAIK) or something broke in jquery-rails v4.0.0.