Hi,
And it is done during the step "payment", not during the step "cart".
But we don't have any screenshot of that checkout step, there is just the screenshot of the checkout cart so, it is not possible to help you.
As I said:
The step "HikaShop user points" is in the third step so you can't see it in the first step of the checkout, where you just have the cart. At this moment I don't understand the problem because ; yes for sure the cart will show the deduction of the points.
The plugin has been made to read a cookie in order to know if it remove or not the points, but if there is no cookie the function of the plugin is not trigger and it's like you don't have the step "HikaShop user points" in your checkout workflow.
You wrote in your first message
the first step of my checkout process already forces the use to spend all her points
Which is right but because your workflow is not good.
Please change your checkout workflow to something more useful for your customers.
Do not display the "cart status" before the login, do not display the "user points" without the cart/cart status (because nobody will understand otherwise).
And please, please ! Provide a screenshot of your checkout workflow for the step where you have the "user points".
Not the first step (with cart status), not the fourth step (with cart/status/coupon), the third one with "payment / user points".
Thanks to take my recommendation but please, but please, take them all.
Regards,