Hello,
When you use the setting "force chosen", HikaShop will call these Joomla functions
JHTML::_('behavior.framework');
JHtml::_('formbehavior.chosen', 'select');
Here the Joomla reference :
developer.joomla.org/joomlacode-archive/issue-31159.html
So, you're right that, since Joomla 3.3.x the inclusion of "behavior.framework" is no longer required.
Now you can do not use that setting and include chosen directly in your template ; it will have the same final effect.
We will see to add a patch for the next release.
Regards,