Initial payment not collected correctly after remove Subscription Delays Add On

I used to set up a 7-day free trial with Subscription Delays Add On.

However, my client would like to cancel this offer. So I delete the 7 in the input field and then remove the add on.

We found that the invoice in Stripe shown $0 payment (should be $57) and display 90-day (same as payment cycle, 3 months) trial label. This behavior is totally wrong.

This is an urgent issue that we cannot collect payment. How can I resolve it?

Thanks!