Steps to reproduce the issue

• set a template as default
• set another template assigned on a specific page
• use the function JHtml::_('jquery.framework'); in a plugin or else on this page
• the assigned template will not be shown, the default template is used.
• unpublish the plugin or comment the line, the assigned template is used

Expected result

• the assigned template shall be used on the specific page

Actual result

• assigned template not used, the default one is used instead

System information (as much as possible)

Additional comments

I have found the problem in the file
libraries\cms\html\html.php
in the function "includeRelativeFiles"

It searches for the template with "$template = JFactory::getApplication()->getTemplate();" and it seems that it returns the default template

In fact the problem may be more in the getTemplate() function, I have not investigated more for now...