no matter what number I enter the donation is 100 in checkout page

I have put the following code into a WP page.
[wc_qd_single]

It gives me a nice field to fill in , but at the checkout the number is alway 100 no matter what number I really entered

How can I allow donors to pay what they wish?

https://www.ads-software.com/plugins/woocommerce-quick-donation/