[BUG] reload page when checkout

Hi, i found BUG in woocommerce 2.5

follow this instruction
1. open web, certain you not login.
2. add a product into cart, and checkout with new account.
3. place order.
4. back to shop and add product again to new buy.
5. goto cart and checkout.
6. you will found a bug, the page will reload after ajax checking.

ya that its.
awesome plugin, hope will be fix.

thanks
rudy

https://ww.wp.xz.cn/plugins/woocommerce/