Subtotal Not Updating when Product Option is Selected

I’m seeing a weird behavior on this multipage gravity form that was working on the previous version of this form, which has only changed minimally. It seems like it could be a gravity forms glitch. The subtotals have historically updated automatically in the element at the footer of each page. Now, the subtotal doesn’t update on the first couple of pages (page 3, 5 - Page 4 is skipped if you choose fiddle divisitions on the first page). But, it does update automatically when you add a guest on page 7, although not when you select a t-shirt on the same page. https://www.fiddlecontest.org/contestants/register-online/
Password: Testing123

The subtotal does update when you click the button to proceed to the next page, and go back.

The subtotal fields are all setup the same, and the products are either dropdown or radio button variable products. There doesn’t seem to be a pattern between the type of product.

Thank you so much for your help!

Vi