Ticket invoice fields are not preserved after failed server validation

[enrico-sorcinelli]

Describe the bug

In the ticket page, the invoice fields are not preserved after a failed server validation.

PS: I searched over open issues and PRs and I didn't found simlar one, so sorry in advance if it's a duplicate

To reproduce

Steps to reproduce the behavior:

1. Activate Camptix Invoices for WordCamp.org plugin and enable Ticket > Setup > Activate invoice requests option from Dashboard.
2. Create from dashboard a Ticket post and setup Ticket page (it has to have at least the [camptix] shortcode).
3. Go to FE ticket page, select a non-zero quantity for the ticket and ckicl on Register.
4. Fill-in all required fields by using and e-mail address that passes client syntax check but not server check too (e.g. a@b.c).
5. Scroll down and activate I need an invoice and fill-in all required fields.
6. Select a payment method and click on Checkout.
7. The checkout should fail (the ticket page show on top error messages) and all the I need an invoice fields values are loss.

Expected behavior

After server validation error, the returned ticket page should have:

• I need an invoice field checked.
• Invoice fields visible.
• Invoice fields prefilled with values that user filled-in before submission.

Screenshots / Screencasts

n.a.

WordCamp

All WordCamp sites having I need an invoice option enabled.
I'm working on a WordCamp event site and we haven't published yet the ticket page but the bug occurs also in the following WordCamp sites having invoice option activated:

• https://bretagne.wordcamp.org/2024/
• https://gdynia.wordcamp.org/2024/

System

• Device: all
• OS: all
• Browser all