When you switch the view from Manufacturer's Product List you get an undefined Character.
To remove this go to
/var/www/html/XXXXXXX/themes/default-bootstrap/js/global.js:
Comment the following lines:
Line 284:
html += '<h5 itemprop="name">'+ $(element).find('h5').html() + '</h5>';
Line 324:
html += '<h5 itemprop="name">'+ $(element).find('h5').html() + '</h5>';