Page hanging while waiting for m.stripe.com while exporting simplenews emails

I don't know how this related to stripe_pi, I am exporting my simplenews subscribers which has about 50k subscribers, but the page always hanging there when I am exporting and showing "waiting for m.stripe.com " on the bottom of the browse, this module is the only stripe module that I am enabled , so am wondering if this module is causing some issues when exporting lots email subscripbers ? Thanks