Upwork Gallery Filtering On Mobiles (Android not working)

Hi there, i'm wanting to use the filtering features of the Upwork gallery, but finding the filtering tags don't work on Android mobile at least.

You can see an open page on http://comunify.cc/crossfit/excercises/ to test on.

Is this a known issue or is there anything I can do to fix this.

The filtering/lable feature is really useful feature, but site has to be fully responsive.

Thanks
Daniel