With the boostrap3 template, I am finding that jQuery isn't loaded in time for bootstrap's Javascript to do its thing, so it complains. Which would explain why the dropdowns don't work.
My console says:
Uncaught Error: Bootstrap's JavaScript requires jQuery
<anonymous> https://mywebsite.com/lib/tpl/bootstrap3/assets/bootstrap/js/bootstrap.min.js:6
bootstrap.min.js:6:37
<anonymous> https://mywebsite.com/lib/tpl/bootstrap3/assets/bootstrap/js/bootstrap.min.js:6
Uncaught TypeError: b is undefined
<anonymous> https://mywebsite.com/lib/tpl/bootstrap3/assets/typeahead/bootstrap3-typeahead.min.js:1
<anonymous> https://mywebsite.com/lib/tpl/bootstrap3/assets/typeahead/bootstrap3-typeahead.min.js:1
<anonymous> https://mywebsite.com/lib/tpl/bootstrap3/assets/typeahead/bootstrap3-typeahead.min.js:1
bootstrap3-typeahead.min.js:1:11739
Uncaught TypeError: jQuery(...).typeahead is not a function
<anonymous> https://mywebsite.com/lib/exe/js.php?t=bootstrap3&tseed=035c3d5667f9bff0011d9e9a32b7a24f:1