accordion - Twitter Bootstrap Panel Collapse not working when in mobile mode only -

accordion - Twitter Bootstrap Panel Collapse not working when in mobile mode only -

i have used collapse functions in twitter bootstrap 3 set out faq section - listing questions revealing reply 1 @ time clicked upon. works fine on total screen when downwards mobile devices stops working , no answers revealed. ii collapse class on link not seem removed when in mobile mode same code used screen sizes.

(i have changed code below show code view-source)

<div class="panel-group" id="accordion"> <div class='panel panel-default'> <div class='panel-heading'> <h4 class='panel-title'> <a data-toggle='collapse' data-parent='#accordion' href='#collapse1'> possible replace plastic windows wooden box sash windows? </a> </h4> </div> <div id='collapse1' class='panel-collapse collapse'> <div class='panel-body'> <p>yes, if there no originals in property @ neighbours ascertain style appropriate period of home. there may additional work required if reveal has been altered discussed during survey</p> </div> </div> </div> <div class='panel panel-default'> <div class='panel-heading'> <h4 class='panel-title'> <a data-toggle='collapse' data-parent='#accordion' href='#collapse2'> new joinery comply building regulations , other relevant laws? </a> </h4> </div> <div id='collapse2' class='panel-collapse collapse'> <div class='panel-body'> <p>yes, our new box sash windows compliant part l building regulations , meet or exceed thermal , quality requirements set out our industry regulator. double glazed replacement sashes considered refurbishments , hence not subject building control.</p> </div> </div> </div> </div>

i have studied quite time , can not see / nt understand problem coming from. help much appreciated you

david

twitter-bootstrap accordion panel collapse