Possible Broken Foot Switch

Hi,

I've recently finished building my Pedalshield Due and have not yet gotten it to work properly. I get a signal through the pedal but only for a very short moment when the footswitch is pushed down. Otherwise, there is no signal. I have attached a video to help describe my problem:



Since a signal is able to pass through at a certain point I'm suspecting the issue is with the footswitch itself and needs to be replaced? Forgive me if I'm missing the point entirely or I've made a stupid error, I have no prior experience in electronics.

Thanks for any help.